KSZ8893FQL

KSZ8893FQL Single-Chip 3-Port Switch with Fiber Support Rev. 1.3 General Description The KSZ8893FQL, a highly integrated single-chip 3 port Fast Ethernet switch is designed for applications with fiber support such as media converter. It provides two 10/100 transceivers with patented mixed-signal lowpower technology, three media access control (MAC) units, a high-speed non-blocking switch fabric, a Layer-2 managed switch and TS-1000 OAM (Operations, Administration and Management) V2 in a compact solution. Backwards compatible to the TS-1000 (2002) specification, TS-1000 V2 is an OAM sub-layer that provides communication between CO (central office) and CPE (customer premises equipment). In fiber mode, one PHY unit can be configurable to 100Base-FX, 100Base-SX, or 10Base-FL fiber for conversion to 10Base-T and 100Base-TX copper. A fiber LED driver and post amplifier are also included for 10Base-FL and 100Base-SX applications. LinkMD® In copper mode, both PHY units support 10Base-T and 100Base-TX with HP Auto MDI/MDI-X for reliable detection of and correction for straight-through and crossover cables, and LinkMD® TDR-based cable diagnostics for identification of faulty cabling. The high performance switching engine features an extensive feature set that includes programmable rate limiting, tag/port-based VLAN, 4 priority class, RMII/MII/SNI and CPU control/data interfaces to effectively address both current and emerging Fast Ethernet applications. The KSZ8893FQL comes in a lead-free package (see Ordering Information). Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. Functional Diagram KSZ8893FQL LinkMD is a registered trademark of Micrel, Inc Product/Application names used in this datasheet are for identification purposes only and may be trademarks of their respective companies. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com October 2007 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL • Control registers configurable on the fly (port-priority, 802.1p/d/q, AN…) QoS/CoS Packet Prioritization Support • Per port, 802.1p and DiffServ-based • Re-mapping of 802.1p priority field per port basis • Four priority levels Advanced Switch Features • IEEE 802.1q VLAN support for up to 16 groups (fullrange of VLAN IDs) • VLAN ID tag/untag options, per port basis • IEEE 802.1p/q tag insertion or removal on a per port basis (egress) • Programmable rate limiting at the ingress and egress on a per port basis • Broadcast storm protection with % control (global and per port basis) • IEEE 802.1d spanning tree protocol support • Special tagging mode to inform the processor which ingress port receives the packet • IGMP snooping (Ipv4) and MLD snooping (Ipv6) support for multicast packet filtering • MAC filtering function to forward unknown unicast packets to specified port • Double-tagging support Low Latency Support • Repeater mode Switch Monitoring Features • Port mirroring/monitoring/sniffing: ingress and/or egress traffic to any port or MII • MIB counters for fully compliant statistics gathering, 34 MIB counters per port • Loopback modes for remote diagnostic of failure Low Power Dissipation • Full-chip hardware power-down (register configuration not saved) • Per port based software power-save on PHY (idle link detection, register configuration preserved) • Voltages: – Core 1.2V – I/O and Transceiver 3.3V Available in 128-Pin PQFP, Lead-free package Features Integrated 3-Port 10/100 Ethernet Switch • Three MACs and two PHYs fully compliant with IEEE 802.3u standard • Non-blocking switch fabric assures fast packet delivery by utilizing an 1K MAC address lookup table and a store-and-forward architecture • Full duplex IEEE 802.3x flow control (PAUSE) with force mode option • Half-duplex back pressure flow control • HP Auto MDI-X for reliable detection of and correction for straight-through and crossover cables with disable and enable option • Micrel LinkMD® TDR-based cable diagnostics permit identification of faulty copper cabling • 100Base-FX, 100Base-SX and 10Base-FL fiber support on port 1 • MII interface supports both MAC mode and PHY mode • RMII interface support with external 50MHz system clock • 7-wire serial network interface (SNI) support for legacy MAC • Comprehensive LED Indicator support for link, activity, full/half duplex and 10/100 speed Fiber Support • Integrated LED driver and post amplifier for 10BaseFL and 100Base-SX optical modules TTC TS-1000 OAM • Supports OAM sub-layer which conforms to TS-1000 V2 specification from TTC (Telecommunication Technology Committee) • Sends and receives OAM frames to Center or Terminal side • Loop back mode to support loop back packet from Center side to Terminal side • Far-end fault detection with disable and enable • Link Transparency to indicate link down from link partner • Unique User Defined Register (UDR) feature brings OAM to low cost/complexity nodes Comprehensive Configuration Register Access • SMI, SPI and I2C management interfaces to all 8-bit internal registers • MII management (MIIM) interface to PHY registers • I/O pins strapping and EEPROM to program selective registers in unmanaged switch mode October 2007 2 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Applications • Media Conversion Modules: – 10Base-FL 10Base-T – 100Base-SX 100Base-TX – 100Base-FX 100Base-TX • FTTx Managed/Unmanaged Media Converters • Fiber Broadband Gateways Ordering Information Part Number KSZ8893FQL KSZ8893FQL-FX Temp. Range 0°C to 70°C 0°C to 70°C Package 128-Pin PQFP 128-Pin PQFP Lead Finish Pb-Free Pb-Free Description Port 1 supports 10Base-FL and 100Base-SX with LED driver and post amp Port 1 supports 100Base-FX with TS-1000 OAM V2 October 2007 3 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Revision History Revision 1.0 1.1 Date 07/05/06 02/08/07 Summary of Changes Data sheet created. Modify Table 10. RMII Signal Connections Add TLA-6T718 to Table 37. Qualified Single Port Magnetics Remove KSZ8893FQLI from the datasheet 1.2 1.3 06/19/07 10/16/07 Update Ordering Information Add Thermal Resistance (θJC) to Operating Rating Recommend connecting a 100ohm resistor between VDDC and 3.3V power rail. October 2007 4 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Contents Pin Configuration ............................................................................................................................................................ 12 Pin Description ................................................................................................................................................................ 13 Functional Description ................................................................................................................................................... 22 Functional Overview: Media Conversion...................................................................................................................... 22 TS-1000 OAM Operation ............................................................................................................................................ 22 OAM Frame Format ............................................................................................................................................. 22 Media Converter Modes....................................................................................................................................... 24 MC Loop Back Operation..................................................................................................................................... 25 Dedicated TS-1000 Registers & Pins................................................................................................................... 26 10Base-FL Operation ................................................................................................................................................. 27 Physical Interface ................................................................................................................................................. 27 Enabling 10Base-FL Mode................................................................................................................................... 27 100Base-SX Operation............................................................................................................................................... 27 Physical Interface ................................................................................................................................................. 27 Enabling 100Base-SX Mode ................................................................................................................................ 27 100Base-TX Transmit................................................................................................................................................. 28 100Base-TX Receive.................................................................................................................................................. 28 PLL Clock Synthesizer................................................................................................................................................ 28 Scrambler/De-scrambler (100Base-TX Only)............................................................................................................. 28 100Base-FX Operation ............................................................................................................................................... 29 100Base-FX Signal Detection..................................................................................................................................... 29 100Base-FX Far-End Fault......................................................................................................................................... 29 10Base-T Transmit ..................................................................................................................................................... 29 10Base-T Receive ...................................................................................................................................................... 29 Fiber LED Driver ......................................................................................................................................................... 29 Post Amplifier.............................................................................................................................................................. 30 Power Management.................................................................................................................................................... 30 MDI/MDI-X Auto Crossover ........................................................................................................................................ 30 Straight Cable....................................................................................................................................................... 30 Crossover Cable................................................................................................................................................... 31 Auto-Negotiation ......................................................................................................................................................... 32 LinkMD Cable Diagnostics.......................................................................................................................................... 33 Access.................................................................................................................................................................. 33 Usage ................................................................................................................................................................... 33 Functional Overview: MAC and Switch......................................................................................................................... 34 Address Lookup.......................................................................................................................................................... 34 Learning ...................................................................................................................................................................... 34 Migration ..................................................................................................................................................................... 34 Aging........................................................................................................................................................................... 34 Forwarding .................................................................................................................................................................. 34 Switching Engine ........................................................................................................................................................ 37 MAC Operation ........................................................................................................................................................... 37 Inter Packet Gap (IPG)......................................................................................................................................... 37 Back-Off Algorithm ............................................................................................................................................... 37 Late Collision........................................................................................................................................................ 37 Illegal Frames....................................................................................................................................................... 37 Full Duplex Flow Control ...................................................................................................................................... 37 Half-Duplex Backpressure ................................................................................................................................... 37 Broadcast Storm Protection ................................................................................................................................. 38 MII Interface Operation ............................................................................................................................................... 38 RMII Interface Operation ............................................................................................................................................ 39 SNI (7-Wire) Operation ............................................................................................................................................... 40 MII Management (MIIM) Interface .............................................................................................................................. 41 Serial Management Interface (SMI)............................................................................................................................ 41 October 2007 5 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Repeater Mode ........................................................................................................................................................... 42 Advanced Switch Functions .......................................................................................................................................... 42 Spanning Tree Support............................................................................................................................................... 42 Special Tagging Mode ................................................................................................................................................ 43 IGMP Support ............................................................................................................................................................. 44 IGMP Snooping .................................................................................................................................................... 44 Multicast Address Insertion in the Static MAC Table ........................................................................................... 44 IPv6 MLD Snooping.................................................................................................................................................... 44 Port Mirroring Support ................................................................................................................................................ 44 IEEE 802.1Q VLAN Support....................................................................................................................................... 45 QoS Priority Support................................................................................................................................................... 46 Port-Based Priority...................................................................................................................................................... 46 802.1p-Based Priority ................................................................................................................................................. 46 DiffServ-Based Priority ............................................................................................................................................... 47 Rate Limiting Support ................................................................................................................................................. 47 Unicast MAC Address Filtering................................................................................................................................... 47 Configuration Interface ............................................................................................................................................... 47 I2C Master Serial Bus Configuration.................................................................................................................... 47 I2C Slave Serial Bus Configuration...................................................................................................................... 48 SPI Slave Serial Bus Configuration...................................................................................................................... 49 Loopback Support....................................................................................................................................................... 52 Far-end Loopback ................................................................................................................................................ 52 Near-end (Remote) Loopback.............................................................................................................................. 53 MII Management (MIIM) Registers ................................................................................................................................. 54 PHY1 Register 0 (PHYAD = 0x1, REGAD = 0x0): MII Basic Control......................................................................... 55 PHY2 Register 0 (PHYAD = 0x2, REGAD = 0x0): MII Basic Control......................................................................... 55 PHY1 Register 1 (PHYAD = 0x1, REGAD = 0x1): MII Basic Status .......................................................................... 56 PHY2 Register 1 (PHYAD = 0x2, REGAD = 0x1): MII Basic Status .......................................................................... 56 PHY1 Register 2 (PHYAD = 0x1, REGAD = 0x2): PHYID High................................................................................. 56 PHY2 Register 2 (PHYAD = 0x2, REGAD = 0x2): PHYID High................................................................................. 56 PHY1 Register 3 (PHYAD = 0x1, REGAD = 0x3): PHYID Low.................................................................................. 56 PHY2 Register 3 (PHYAD = 0x2, REGAD = 0x3): PHYID Low.................................................................................. 56 PHY1 Register 4 (PHYAD = 0x1, REGAD = 0x4): Auto-Negotiation Advertisement Ability....................................... 57 PHY2 Register 4 (PHYAD = 0x2, REGAD = 0x4): Auto-Negotiation Advertisement Ability....................................... 57 PHY1 Register 5 (PHYAD = 0x1, REGAD = 0x5): Auto-Negotiation Link Partner Ability .......................................... 57 PHY2 Register 5 (PHYAD = 0x2, REGAD = 0x5): Auto-Negotiation Link Partner Ability .......................................... 57 PHY1 Register 29 (PHYAD = 0x1, REGAD = 0x1D): LinkMD Control/Status ........................................................... 58 PHY2 Register 29 (PHYAD = 0x2, REGAD = 0x1D): LinkMD Control/Status ........................................................... 58 PHY1 Register 31 (PHYAD = 0x1, REGAD = 0x1F): PHY Special Control/Status.................................................... 58 PHY2 Register 31 (PHYAD = 0x2, REGAD = 0x1F): PHY Special Control/Status.................................................... 58 Global Registers ......................................................................................................................................................... 60 Register 0 (0x00): Chip ID0.................................................................................................................................. 60 Register 1 (0x01): Chip ID1 / Start Switch ........................................................................................................... 60 Register 2 (0x02): Global Control 0...................................................................................................................... 61 Register 3 (0x03): Global Control 1...................................................................................................................... 61 Register 4 (0x04): Global Control 2...................................................................................................................... 62 Register 5 (0x05): Global Control 3...................................................................................................................... 63 Register 6 (0x06): Global Control 4...................................................................................................................... 63 Register 7 (0x07): Global Control 5...................................................................................................................... 64 Register 8 (0x08): Global Control 6...................................................................................................................... 64 Register 9 (0x09): Global Control 7...................................................................................................................... 64 Register 10 (0x0A): Global Control 8 ................................................................................................................... 65 Register 11 (0x0B): Global Control 9 ................................................................................................................... 65 Register 12 (0x0C): Global Control 10 ................................................................................................................. 65 Register 13 (0x0D): Global Control 11 ................................................................................................................. 66 October 2007 6 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Register 14 (0x0E): Global Control 12 ................................................................................................................. 66 Register 15 (0x0F): Global Control 13 ................................................................................................................. 66 Port Registers ............................................................................................................................................................. 67 Register 16 (0x10): Port 1 Control 0 .................................................................................................................... 67 Register 32 (0x20): Port 2 Control 0 .................................................................................................................... 67 Register 48 (0x30): Port 3 Control 0 .................................................................................................................... 67 Register 17 (0x11): Port 1 Control 1 .................................................................................................................... 68 Register 33 (0x21): Port 2 Control 1 .................................................................................................................... 68 Register 49 (0x31): Port 3 Control 1 .................................................................................................................... 68 Register 18 (0x12): Port 1 Control 2 .................................................................................................................... 69 Register 34 (0x22): Port 2 Control 2 .................................................................................................................... 69 Register 50 (0x32): Port 3 Control 2 .................................................................................................................... 69 Register 19 (0x13): Port 1 Control 3 .................................................................................................................... 69 Register 35 (0x23): Port 2 Control 3 .................................................................................................................... 69 Register 51 (0x33): Port 3 Control 3 .................................................................................................................... 69 Register 20 (0x14): Port 1 Control 4 .................................................................................................................... 70 Register 36 (0x24): Port 2 Control 4 .................................................................................................................... 70 Register 52 (0x34): Port 3 Control 4 .................................................................................................................... 70 Register 21 (0x15): Port 1 Control 5 .................................................................................................................... 70 Register 37 (0x25): Port 2 Control 5 .................................................................................................................... 70 Register 53 (0x35): Port 3 Control 5 .................................................................................................................... 70 Register 22 (0x16): Port 1 Control 6 .................................................................................................................... 71 Register 38 (0x26): Port 2 Control 6 .................................................................................................................... 71 Register 54 (0x36): Port 3 Control 6 .................................................................................................................... 71 Register 23 (0x17): Port 1 Control 7 .................................................................................................................... 72 Register 39 (0x27): Port 2 Control 7 .................................................................................................................... 72 Register 55 (0x37): Port 3 Control 7 .................................................................................................................... 72 Register 24 (0x18): Port 1 Control 8 .................................................................................................................... 73 Register 40 (0x28): Port 2 Control 8 .................................................................................................................... 73 Register 56 (0x38): Port 3 Control 8 .................................................................................................................... 73 Register 25 (0x19): Port 1 Control 9 .................................................................................................................... 74 Register 41 (0x29): Port 2 Control 9 .................................................................................................................... 74 Register 57 (0x39): Port 3 Control 9 .................................................................................................................... 74 Register 26 (0x1A): Port 1 PHY Special Control/Status ...................................................................................... 75 Register 42 (0x2A): Port 2 PHY Special Control/Status ...................................................................................... 75 Register 58 (0x3A): Reserved, not applied to port 3............................................................................................ 75 Register 27 (0x1B): Port 1 LinkMD Result ........................................................................................................... 75 Register 43 (0x2B): Port 2 LinkMD Result ........................................................................................................... 75 Register 59 (0x3B): Reserved, not applied to port 3............................................................................................ 75 Register 28 (0x1C): Port 1 Control 12.................................................................................................................. 76 Register 44 (0x2C): Port 2 Control 12.................................................................................................................. 76 Register 60 (0x3C): Reserved, not applied to port 3............................................................................................ 76 Register 29 (0x1D): Port 1 Control 13.................................................................................................................. 77 Register 45 (0x2D): Port 2 Control 13.................................................................................................................. 77 Register 61 (0x3D): Reserved, not applied to port 3............................................................................................ 77 Register 30 (0x1E): Port 1 Status 0 ..................................................................................................................... 77 Register 46 (0x2E): Port 2 Status 0 ..................................................................................................................... 77 Register 62 (0x3E): Reserved, not applied to port 3............................................................................................ 77 Register 31 (0x1F): Port 1 Status 1...................................................................................................................... 78 Register 47 (0x2F): Port 2 Status 1...................................................................................................................... 78 Register 63 (0x3F): Port 3 Status 1...................................................................................................................... 78 TS-1000 Media Converter Registers .......................................................................................................................... 79 Register 64 (0x40): PHY Address ........................................................................................................................ 79 Register 65 (0x41): Center Side Status ............................................................................................................... 79 Register 66 (0x42): Center Side Command......................................................................................................... 80 October 2007 7 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Register 67 (0x43): PHY-SW Initialize ................................................................................................................. 80 Register 68 (0x44): Loop Back Setup1 ................................................................................................................ 81 Register 69 (0x45): Loop Back Setup2 ................................................................................................................ 82 Register 70 (0x46): Loop Back Result Counter for CRC Error ............................................................................ 82 Register 71 (0x47): Loop Back Result Counter for Timeout ................................................................................ 82 Register 72 (0x48): Loop Back Result Counter for Good Packet ........................................................................ 83 Register 73 (0x49): Additional Status (Center and Terminal side) ...................................................................... 83 Register 74 (0x4A): Remote Command 1............................................................................................................ 84 Register 75 (0x4B): Remote Command 2............................................................................................................ 84 Register 76 (0x4C): Remote Command 3............................................................................................................ 85 Register 77 (0x4D): Valid MC Packet Transmitted Counter ................................................................................ 85 Register 78 (0x4E): Valid MC Packet Received Counter..................................................................................... 85 Register 79 (0x4F): Shadow of 0x58h Register ................................................................................................... 85 Register 80 (0x50): My Status 1 (Terminal and Center side) .............................................................................. 86 Register 81 (0x51): My Status 2........................................................................................................................... 86 Register 82 (0x52): My Vendor Info (1)................................................................................................................ 87 Register 83 (0x53): My Vendor Info (2)................................................................................................................ 87 Register 84 (0x54): My Vendor Info (3)................................................................................................................ 87 Register 85 (0x55): My Model Info (1).................................................................................................................. 87 Register 86 (0x56): My Model Info (2).................................................................................................................. 87 Register 87 (0x57): My Model Info (3).................................................................................................................. 87 Register 88 (0x58): LNK Partner Status (1) ......................................................................................................... 88 Register 89 (0x59): LNK Partner Status (2) ......................................................................................................... 88 Register 90 (0x5A): LNK Partner Vendor Info (1) ................................................................................................ 88 Register 91 (0x5B): LNK Partner Vendor Info (2) ................................................................................................ 88 Register 92 (0x5C): LNK Partner Vendor Info (3) ................................................................................................ 88 Register 93 (0x5D): LNK Partner Model Info (1).................................................................................................. 88 Register 94 (0x5E): LNK Partner Model Info (2) .................................................................................................. 88 Register 95 (0x5F): LNK Partner Model Info (3) .................................................................................................. 88 Advanced Control Registers ....................................................................................................................................... 89 Register 96 (0x60): TOS Priority Control Register 0............................................................................................ 89 Register 97 (0x61): TOS Priority Control Register 1............................................................................................ 89 Register 98 (0x62): TOS Priority Control Register 2............................................................................................ 89 Register 99 (0x63): TOS Priority Control Register 3............................................................................................ 89 Register 100 (0x64): TOS Priority Control Register 4.......................................................................................... 90 Register 101 (0x65): TOS Priority Control Register 5.......................................................................................... 90 Register 102 (0x66): TOS Priority Control Register 6.......................................................................................... 90 Register 103 (0x67): TOS Priority Control Register 7.......................................................................................... 90 Register 104 (0x68): TOS Priority Control Register 8.......................................................................................... 91 Register 105 (0x69): TOS Priority Control Register 9.......................................................................................... 91 Register 106 (0x6A): TOS Priority Control Register 10 ....................................................................................... 91 Register 107 (0x6B): TOS Priority Control Register 11 ....................................................................................... 91 Register 108 (0x6C): TOS Priority Control Register 12 ....................................................................................... 92 Register 109 (0x6D): TOS Priority Control Register 13 ....................................................................................... 92 Register 110 (0x6E): TOS Priority Control Register 14 ....................................................................................... 92 Register 111 (0x6F): TOS Priority Control Register 15........................................................................................ 92 Switch MAC Address Registers.................................................................................................................................. 93 Register 112 (0x70): MAC Address Register 0.................................................................................................... 93 Register 113 (0x71): MAC Address Register 1.................................................................................................... 93 Register 114 (0x72): MAC Address Register 2.................................................................................................... 93 Register 115 (0x73): MAC Address Register 3.................................................................................................... 93 Register 116 (0x74): MAC Address Register 4.................................................................................................... 93 Register 117 (0x75): MAC Address Register 5.................................................................................................... 93 User Defined Registers............................................................................................................................................... 93 Register 118 (0x76): User Defined Register 1 ..................................................................................................... 93 October 2007 8 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Register 119 (0x77): User Defined Register 2 ..................................................................................................... 93 Register 120 (0x78): User Defined Register 3 ..................................................................................................... 93 Indirect Access Registers ........................................................................................................................................... 94 Register 121 (0x79): Indirect Access Control 0 ................................................................................................... 94 Register 122 (0x7A): Indirect Access Control 1 ................................................................................................... 94 Register 123 (0x7B): Indirect Data Register 8 ..................................................................................................... 94 Register 124 (0x7C): Indirect Data Register 7 ..................................................................................................... 94 Register 125 (0x7D): Indirect Data Register 6 ..................................................................................................... 94 Register 126 (0x7E): Indirect Data Register 5 ..................................................................................................... 94 Register 127 (0x7F): Indirect Data Register 4 ..................................................................................................... 94 Register 128 (0x80): Indirect Data Register 3...................................................................................................... 95 Register 129 (0x81): Indirect Data Register 2...................................................................................................... 95 Register 130 (0x82): Indirect Data Register 1...................................................................................................... 95 Register 131 (0x83): Indirect Data Register 0...................................................................................................... 95 Reserved Registers .................................................................................................................................................... 95 Register 132 (0x84): Digital Testing Status 0 ...................................................................................................... 95 Register 133 (0x85): Digital Testing Control 0 ..................................................................................................... 95 Register 134 (0x86): Analog Testing Control 0.................................................................................................... 95 Register 135 (0x87): Analog Testing Control 1.................................................................................................... 95 Register 136 (0x88): Analog Testing Control 2.................................................................................................... 95 Register 137 (0x89): Analog Testing Control 3.................................................................................................... 96 Register 138 (0x8A): Analog Testing Status........................................................................................................ 96 Register 139 (0x8B): Analog Testing Control 4 ................................................................................................... 96 Register 140 (0x8C): QM Debug 1....................................................................................................................... 96 Register 141 (0x8D): QM Debug 2....................................................................................................................... 96 Static MAC Address Table.......................................................................................................................................... 97 VLAN Table................................................................................................................................................................. 99 Dynamic MAC Address Table................................................................................................................................... 100 MIB (Management Information Base) Counters ....................................................................................................... 101 Additional MIB Counter Information ................................................................................................................... 103 Absolute Maximum Ratings(1) ...................................................................................................................................... 104 Operating Ratings(2) ...................................................................................................................................................... 104 Electrical Characteristics(4) .......................................................................................................................................... 104 Timing Diagrams ........................................................................................................................................................... 106 EEPROM Timing ...................................................................................................................................................... 106 SNI Timing ................................................................................................................................................................ 107 MII Timing ................................................................................................................................................................. 108 RMII Timing............................................................................................................................................................... 109 SPI Input Timing ....................................................................................................................................................... 110 SPI Output Timing .................................................................................................................................................... 111 Auto-Negotiation Timing ........................................................................................................................................... 112 October 2007 9 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL List of Figures Figure 1. TS-1000 OAM Frame Format ........................................................................................................................... 23 Figure 2. Typical TS-1000 Media Converter Application ................................................................................................. 24 Figure 3. KSZ8893FQL MC Loop Back Paths ................................................................................................................. 25 Figure 4. Typical Straight Cable Connection ................................................................................................................... 31 Figure 5. Typical Crossover Cable Connection ............................................................................................................... 31 Figure 6. Auto-Negotiation and Parallel Operation. ......................................................................................................... 32 Figure 7. Destination Address Lookup Flow Chart, Stage 1 ............................................................................................ 35 Figure 8. Destination Address Resolution Flow Chart, Stage 2....................................................................................... 36 Figure 9. 802.1p Priority Field Format.............................................................................................................................. 46 Figure 10. KSZ8893FQL EEPROM Configuration Timing Diagram. ............................................................................... 48 Figure 11. SPI Write Data Cycle. ..................................................................................................................................... 50 Figure 12. SPI Read Data Cycle. ..................................................................................................................................... 50 Figure 13. SPI Multiple Write. .......................................................................................................................................... 51 Figure 14. SPI Multiple Read. .......................................................................................................................................... 51 Figure 15. Far-End Loopback Path. ................................................................................................................................. 52 Figure 16. Near-end (Remote) Loopback Path................................................................................................................ 53 Figure 17. EEPROM Interface Input Timing Diagram.................................................................................................... 106 Figure 18. EEPROM Interface Output Timing Diagram ................................................................................................. 106 Figure 19. SNI Timing – Data Received from SNI ......................................................................................................... 107 Figure 20. SNI Timing – Data Input-to-SNI .................................................................................................................... 107 Figure 21. MII Timing – Data Received from MII ........................................................................................................... 108 Figure 22. MII Timing – Data Input-to-MII ...................................................................................................................... 108 Figure 23. RMII Timing – Data Received from RMII ...................................................................................................... 109 Figure 24. RMII Timing – Data Input-to-RMII................................................................................................................. 109 Figure 25. SPI Input Timing ........................................................................................................................................... 110 Figure 26. SPI Output Timing......................................................................................................................................... 111 Figure 27. Auto-Negotiation Timing ............................................................................................................................... 112 Figure 28. Reset Timing ................................................................................................................................................. 113 Figure 29. Recommended Reset Circuit ........................................................................................................................ 114 Figure 30. Recommended Reset Circuit for interfacing with CPU/FPGA Reset Output................................................ 114 October 2007 10 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL List of Tables Table 1. TS-1000 Media Converter Mode Selection........................................................................................................ 24 Table 2. Dedicated TS-1000 Pins .................................................................................................................................... 26 Table 3. 10Base-FL Configuration ................................................................................................................................... 27 Table 4. 100Base-SX Configuration................................................................................................................................. 28 Table 5. FX and TX Mode Selection ................................................................................................................................ 29 Table 6. Programmable Current Values for Fiber LED Driver ......................................................................................... 30 Table 7. MDI/MDI-X Pin Definitions ................................................................................................................................. 30 Table 8. MII Signals.......................................................................................................................................................... 38 Table 9. RMII Signal Description...................................................................................................................................... 39 Table 10. RMII Signal Connections.................................................................................................................................. 40 Table 11. SNI Signals....................................................................................................................................................... 40 Table 12. MII Management Interface Frame Format ....................................................................................................... 41 Table 13. Serial Management Interface (SMI) Frame Format ......................................................................................... 41 Table 14. Spanning Tree States ...................................................................................................................................... 42 Table 15. Special Tagging Mode Format ......................................................................................................................... 43 Table 16. STPID Egress Rules (Processor to Switch Port 3) .......................................................................................... 43 Table 17. STPID Egress Rules (Switch Port 3 to Processor) .......................................................................................... 44 Table 18. FID+DA Lookup in VLAN Mode ....................................................................................................................... 45 Table 19. FID+SA Lookup in VLAN Mode ....................................................................................................................... 45 Table 20. KSZ8893FQL SPI Connections ....................................................................................................................... 49 Table 21. Format of Static MAC Table (8 Entries) ........................................................................................................... 97 Table 22. Format of Static VLAN Table (16 Entries)........................................................................................................ 99 Table 23. Format of Dynamic MAC Address Table (1K Entries) ................................................................................... 100 Table 24. Format of “Per Port” MIB Counters ................................................................................................................ 101 Table 25. Port 1’s “Per Port” MIB Counters Indirect Memory Offsets............................................................................ 102 Table 26. Format of “All Port Dropped Packet” MIB Counters....................................................................................... 102 Table 27. “All Port Dropped Packet” MIB Counters Indirect Memory Offsets................................................................ 102 Table 28. EEPROM Timing Parameters ........................................................................................................................ 106 Table 29. SNI Timing Parameters.................................................................................................................................. 107 Table 30. MII Timing Parameters................................................................................................................................... 108 Table 31. RMII Timing Parameters ................................................................................................................................ 109 Table 32. SPI Input Timing Parameters ......................................................................................................................... 110 Table 33. SPI Output Timing Parameters ...................................................................................................................... 111 Table 34. Auto-Negotiation Timing Parameters............................................................................................................. 112 Table 35. Reset Timing Parameters .............................................................................................................................. 113 Table 36. Transformer Selection Criteria ....................................................................................................................... 115 Table 37. Qualified Single Port Magnetics..................................................................................................................... 115 Table 38. Typical Reference Crystal Characteristics ...................................................................................................... 115 October 2007 11 M9999-101607-1.3 Micrel, Inc. October 2007 Pin Configuration UNUSED UNUSED UNUSED DGND VDDIO UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED DGND VDDC UNUSED UNUSED UNUSED TESTEN SCANEN 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 128-Pin PQFP (Q) (Top View) 12 P1LED2 P1LED1 P1LED0 P2LED2 P2LED1 P2LED0 DGND VDDIO MCHS MCCs PDD# ADVFC P2ANEN P2SPD P2DPX P2FFC P1FST P1CRCD P1LPBM P2LED3 DGND VDDC LEDSEL1 NC P1LED3 RMII_EN HWPOVR P2MDIXDIS P2MDIX P1ANEN P1SPD P1DPX P1FFC ML_EN DIAGF PWRDN AGND VDDA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 AGND VDDAP AGND ISET TEST2 TEST1 AGND VDDA TXP2 TXM2 AGND RXP2 RXM2 VDDARX VDDATX TXM1 TXP1 AGND RXM1 RXP1 FXSD1 VDDA AGND MUX2 MUX1 AGND 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 UNUSED PS0 PS1 SPIS_N SDA SCL SPIQ MDIO MDC UNUSED UNUSED VDDC DGND SCONF0 SCONF1 SCRS SCOL SMRXD0 SMRXD1 SMRXD2 SMRXD3 SMRXDV SMRXC VDDIO DGND SMTXC / REFCLK SMTXER SMTXD0 SMTXD1 SMTXD2 SMTXD3 SMTXEN LEDSEL0 UNUSED UNUSED RST_N X2 X1 KSZ8893FQL M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Pin Description Pin Number 1 2 3 Pin Name P1LED2 P1LED1 P1LED0 Type(1) Ipu/O Ipu/O Ipu/O P1LED3 P1LED2 P1LED1 P1LED0 Pin Function Port 1LED indicators (active low) (apply to all modes of operation, except Repeater Mode) [LEDSEL1, LEDSEL0] [0,0] Default — Link/Act Full duplex/Col Speed [0,1] — 100Link/Act 10Link/Act Full duplex [LEDSEL1, LEDSEL0] [1,0] P1LED3 P1LED2 P1LED1 P1LED0 Act Link Full duplex/Col Speed [1,1] — — — — Link/Act, 100Link/Act, 10Link/Act: Low (link), High (no link), Toggle (transmit / receive activity) Full duplex/Col: Low (full duplex), High (half duplex), Toggles (collision) Speed: Low (100Base-TX), High (10Base-T) Full duplex: Low (full duplex), High (half duplex) Act: Toggles (transmit / receive activity) Link: Low (link), High (no link) Repeater Mode (only) [LEDSEL1, LEDSEL0] [0,0] P1LED3 P1LED2 P1LED1 P1LED0 RPT_COL: Low (collision) RPT_LINK#/RX (# = port): Low (link), High (no link), Toggles (receive activity) Notes: LEDSEL0 is external strap-in pin 70. LEDSEL1 is external strap-in pin 23. P1LED3 is pin 25. During reset, P1LED[2:0] are inputs for internal testing. RPT_COL RPT_LINK3/RX RPT_LINK2/RX RPT_LINK1/RX October 2007 13 M9999-101607-1.3 Micrel, Inc. Pin Number 4 5 6 Pin Name P2LED2 P2LED1 P2LED0 Type(1) Ipu/O Ipu/O Ipu/O P2LED3 P2LED2 P2LED1 P2LED0 Pin Function Port 2 LED indicators (active low) (apply to all modes of operation, except Repeater Mode) [LEDSEL1, LEDSEL0] [0,0] Default — Link/Act Full duplex/Col Speed [0,1] — 100Link/Act 10Link/Act Full duplex KSZ8893FQL [LEDSEL1, LEDSEL0] [1,0] P2LED3 P2LED2 P2LED1 P2LED0 Act Link Full duplex/Col Speed [1,1] — — — — Link/Act, 100Link/Act, 10Link/Act: Low (link), High (no link), Toggles (transmit / receive activity) Full duplex/Col: Low (full duplex), High (half duplex), Toggles (collision) Speed: Low (100Base-TX), High (10Base-T) Full duplex: Low (full duplex), High (half duplex) Act: Toggles (transmit / receive activity) Link: Low (link), High (no link) Repeater Mode (only) [LEDSEL1, LEDSEL0] [0,0] P2LED3 P2LED2 P2LED1 P2LED0 RPT_ACT: Low (activity) RPT_ERR# (# = port): Low (error status due to either isolation, partition, jabber, or JK error) Notes: LEDSEL0 is external strap-in pin 70. LEDSEL1 is external strap-in pin 23. P2LED3 is pin 20. During reset, P2LED[2:0] are inputs for internal testing. 7 8 DGND VDDIO Gnd P Digital ground 3.3V digital VDD RPT_ACT RPT_ERR3 RPT_ERR2 RPT_ERR1 October 2007 14 M9999-101607-1.3 Micrel, Inc. Pin Number 9 10 Pin Name MCHS MCCS Type(1) Ipd Ipd Pin Function KSZ8893FQL operating modes (defined below): (MCHS, MCCS) Description Normal 3 port switch mode (3 MAC + 2 PHY) (0, 0) MC mode is disabled. Port 1 is either Fiber or UTP. Port 2 is UTP. Port 3 (MII) is enabled. Center MC mode (3 MAC + 2 PHY) (0, 1) MC mode is enabled. Port 1 is Fiber and has Center MC enabled. Port 2 is UTP. Port 3 (MII) is enabled. Terminal MC mode (2 MAC + 2 PHY) MC mode is enabled. Port 1 is Fiber and has Terminal MC enabled. Port 2 is UTP. Port 3 (MII) is disabled. Terminal MC mode (3 MAC + 2 PHY) MC mode is enabled. Port 1 Fiber and has Terminal MC enabled. Port 2 is UTP. Port 3 (MII) is enabled. KSZ8893FQL (1, 0) (1, 1) 11 PDD# Ipu Power Down Detect 1 = Normal operation. 0 = Power down detected. In Terminal MC mode (pin MCHS is ‘1’), a high to low transition to this pin will cause port 1 (fiber) to generate and send out an “Indicate Terminal MC Condition” OAM frame with the S0 status bit set to ‘1’. 12 13 14 15 ADVFC P2ANEN P2SPD P2DPX Ipu Ipu Ipd Ipd 1 = Advertise the switch’s flow control capability via auto-negotiation. 0 = Will not advertise the switch’s flow control capability via auto-negotiation. 1 = Enable auto-negotiation on port 2. 0 = Disable auto-negotiation on port 2. 1 = Force port 2 to 100BT if P2ANEN = 0. 0 = Force port 2 to 10BT if P2ANEN = 0. 1 = Port 2 default to full duplex mode if P2ANEN = 1 and auto-negotiation fails. Force port 2 in full duplex mode if P2ANEN = 0. 0 = Port 2 default to half duplex mode if P2ANEN = 1 and auto-negotiation fails. Force port 2 in half duplex mode if P2ANEN = 0. 16 P2FFC Ipd 1 = Always enable (force) port 2 flow control feature. 0 = Port 2 flow control feature enable is determine by the auto-negotiation result. October 2007 15 M9999-101607-1.3 Micrel, Inc. Pin Number 17 18 Pin Name P1FST P1LCRCD Type(1) Opu Ipd Pin Function 1 = Normal function. 0 = MC in loopback mode, or MC abnormal conditions occur. In MC loopback mode, KSZ8893FQL 1 = Drop OAM frames and Ethernet frames with the following errors – CRS, undersize, oversize. Loopback Ethernet frames with only good CRC and valid length. 0 = Drop OAM frames only. Loopback all Ethernet frames including those with errors. 19 20 P1LPBM P2LED3 Ipd Opd 1 = Perform MC loopback at PHY of port 1. 0 = Perform MC loopback at MAC of port 2 Port 2 LED indicator Note: An external 1K pull-down is needed on this pin if it is connected to an LED. The 1K resistor will not turn ON the LED. See description in pin 4. 21 22 DGND VDDC / VOUT_1V2 Gnd P Digital ground 1.2V digital VDD Provides VOUT_1V2 to KSZ8893FQL’s input power pins: VDDAP (pin 63), VDDC (pins 91 and 123), and VDDA (pins 38, 43, and 57). It is recommended the pin should be connected to 3.3V power rail by a 100ohm resistor for the internal LDO application. Ipd O Opd LED display mode select. See description in pins 1 and 4. 24 25 NC P1LED3 No connect Port 1 LED indicator Note: An external 1K pull-down is needed on this pin if it is connected to an LED. The 1K resistor will not turn ON the LED. See description in pin 1. 26 RMII_EN Opd Strap pin for RMII Mode 1 = Enable 0 = Disable After reset, this pin has no meaning and is a no connect. 27 HWPOVR Ipd Hardware pin overwrite 1 = Enable: All strap-in pin configurations are overwritten by the EEPROM configuration data, except for P2ANEN (pin 13), P2SPD (pin 14), P2DPX (pin 15) and ML_EN (pin 34). After reset, the pin state for P2ANEN, P2SPD and P2DPX is polled by the KSZ8893FQL. 0 = Disable: All strap-in pin configurations are overwritten by the EEPROM configuration data. 28 P2MDIXDIS Ipd Port 2 Auto MDI/MDI-X PD (default) = enable PU = disable 29 P2MDIX Ipd Port 2 MDI/MDI-X setting when auto MDI/MDI-X is disabled. PD (default) = MDI-X (transmit on TXP2 / TXM2 pins) PU = MDI, (transmit on RXP2 / RXM2 pins) 30 31 P1ANEN P1SPD Ipu Ipd 1 = Enable auto-negotiation on port 1 0 = Disable auto-negotiation on port 1 1 = Force port 1 to 100BT if P1ANEN = 0 0 = Force port 1 to 10BT if P1ANEN = 0 23 LEDSEL1 October 2007 16 M9999-101607-1.3 Micrel, Inc. Pin Number 32 Pin Name P1DPX Type(1) Ipd Pin Function KSZ8893FQL 1 = Port 1 default to full duplex mode if P1ANEN = 1 and auto-negotiation fails. Force port 1 in full-duplex mode if P1ANEN = 0. 0 = Port 1 default to half duplex mode if P1ANEN = 1 and auto-negotiation fails. Force port 1 in half duplex mode if P1ANEN = 0. 1 = Always enable (force) port 1 flow control feature 0 = Port 1 flow control feature enable is determined by auto-negotiation result. 1 = Enable missing link 0 = Disable missing link 1 = Diagnostic fail 0 = Diagnostic normal Chip power down input (active low) 1 = Normal operation 0 = The chip is powered down 33 34 35 36 P1FFC ML_EN DIAGF PWRDN Ipd Ipd Ipd Ipu 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 AGND VDDA AGND MUX1 MUX2 AGND VDDA FXSD1 RXP1 RXM1 AGND TXP1 TXM1 VDDATX VDDARX RXM2 RXP2 AGND TXM2 TXP2 VDDA AGND TEST1 TEST2 ISET AGND VDDAP AGND Gnd P Gnd I I Gnd P I I/O I/O Gnd I/O I/O P P I/O I/O Gnd I/O I/O P Gnd I I O Gnd P Gnd Analog ground 1.2V analog VDD Analog ground No connect 10Base-FL/100Base-SX Enable. Active low. Analog ground 1.2V analog VDD Fiber signal detect / factory test pin Physical receive or transmit signal (+ differential) Physical receive or transmit signal (– differential) Analog ground Physical transmit or receive signal (+ differential) Physical transmit or receive signal (– differential) 3.3V analog VDD 3.3V analog VDD Physical receive or transmit signal (– differential) Physical receive or transmit signal (+ differential) Analog ground Physical transmit or receive signal (– differential) Physical transmit or receive signal (+ differential) 1.2 analog VDD Analog ground Factory test pin – float for normal operation Factory test pin – float for normal operation Set physical transmit output current Pull-down this pin with a 3.01K 1% resistor to ground. Analog ground 1.2V analog VDD for PLL Analog ground October 2007 17 M9999-101607-1.3 Micrel, Inc. Pin Number 65 66 Pin Name X1 X2 Type(1) I O Pin Function 25MHz crystal/oscillator clock connections KSZ8893FQL Pins (X1, X2) connect to a crystal. If an oscillator is used, X1 connects to a 3.3V tolerant oscillator and X2 is no connected. Note: Clock is ±50ppm for both crystal and oscillator. Hardware Reset (active low) Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation LED display mode select See description in pins 1 and 4. Switch MII transmit enable Switch MII transmit data bit 3 Switch MII transmit data bit 2 Switch MII transmit data bit 1 Switch MII transmit data bit 0 Switch MII transmit error Switch MII transmit clock (MII and SNI modes only) Output in PHY MII mode and SNI mode Input in MAC MII mode Reference Clock (RMII mode only) Input for 50MHz ±50ppm system clock Note: In RMII mode, pin X1 is pulled up to VDDIO supply with a 10K resistor and pin X2 is a no connect. 67 68 69 70 71 72 73 74 75 76 77 RST_N UNUSED UNUSED LEDSEL0 SMTXEN SMTXD3 SMTXD2 SMTXD1 SMTXD0 SMTXER SMTXC / REFCLK Ipu I I I I I I I I I I/O 78 79 80 DGND VDDIO SMRXC Gnd P I/O Digital ground 3.3V digital VDD Switch MII receive clock. Output in PHY MII mode Input in MAC MII mode 81 82 SMRXDV SMRXD3 O Ipd/O Switch MII receive data valid Switch MII receive data bit 3 Strap option: switch MII full-duplex flow control PD (default) = disable PU = enable 83 SMRXD2 Ipd/O Switch MII receive data bit 2 Strap option: switch MII is in PD (default) = full-duplex mode PU = half-duplex mode 84 SMRXD1 Ipd/O Switch MII receive data bit 1 Strap option: Switch MII is in PD (default) = 100Mbps mode PU = 10Mbps mode 85 SMRXD0 I/O Switch MII receive data bit 0 Strap option: switch will accept packet size up to PD = 1536 bytes (inclusive) PU = 1522 bytes (tagged), 1518 bytes (untagged) 86 SCOL I/O Switch MII collision detect October 2007 18 M9999-101607-1.3 Micrel, Inc. Pin Number 87 88 89 Pin Name SCRS SCONF1 SCONF0 Type(1) I/O I I Pin Function Switch MII carrier sense Switch MII interface configuration (SCONF1, SCONF0) (0,0) (0,1) (1,0) (1,1) 90 91 92 93 94 95 96 DGND VDDC UNUSED UNUSED MDC MDIO SPIQ Gnd P I I I I/O O Digital core ground 1.2V digital VDD Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation MII management interface: clock input MII management interface: data input/output Note: an external pull-up is needed on this pin when it is in use. SPI slave mode: serial data output See description in pins 100 and 101. Note: an external pull-up is needed on this pin when it is in use. 97 SCL I/O SPI slave mode / I2C slave mode: clock input I2C master mode: clock output See description in pins 100 and 101. 98 SDA I/O SPI slave mode: serial data input I2C master/slave mode: serial data input/output See description in pins 100 and 101. Note: an external pull-up is needed on this pin when it is in use. 99 SPIS_N I SPI slave mode: chip select (active low) Description disable, outputs tri-stated PHY mode MII MAC mode MII PHY mode SNI KSZ8893FQL When SPIS_N is high, the KSZ8893FQL is deselected and SPIQ is held in high impedance state. A high-to-low transition is used to initiate SPI data transfer. See description in pins 100 and 101. Note: an external pull-up is needed on this pin when it is in use. 100 PS1 I Serial bus configuration pins to select mode of access to KSZ8893FQL internal October 2007 19 M9999-101607-1.3 Micrel, Inc. Pin Number 101 Pin Name PS0 Type(1) I Pin Function registers. KSZ8893FQL [PS1, PS0] = [0, 0] — I2C master (EEPROM) mode (If EEPROM is not detected, the KSZ8893FQL will be configured with the default values of its internal registers and the values of its strap-in pins.) Interface Signals SPIQ SCL SDA SPIS_N Type O O I/O I Description Not used (tri-stated) I2C clock I2C data I/O Not used [PS1, PS0] = [0, 1] — I2C slave mode 2 The external I C master will drive the SCL clock. The KSZ8893FQL device addresses are: 1011_1111 1011_1110 Interface Signals SPIQ SCL SDA SPIS_N Type O I I/O I Description Not used (tri-stated) I2C clock I2C data I/O Not used [PS1, PS0] = [1, 0] — SPI slave mode Interface Signals SPIQ SCL SDA SPIS_N Type O I I I Description SPI data out SPI clock SPI data In SPI chip select [PS1, PS0] = [1, 1] – SMI-mode In this mode, the KSZ8893FQL provides access to all its internal 8-bit registers through its MDC and MDIO pins. Note: When (PS1, PS0) ≠ (1,1), the KSZ8893FQL provides access to its 16-bit MIIM registers through its MDC and MDIO pins. 102 103 104 105 106 107 108 109 110 UNUSED UNUSED UNUSED UNUSED DGND VDDIO UNUSED UNUSED UNUSED I I I I Gnd P I I I Unused pin – externally pull up for normal operation Unused pin – externally pull up for normal operation Unused pin – externally pull up for normal operation Unused pin – externally pull up for normal operation Digital ground 3.3V digital VDD Unused pin – externally pull up for normal operation Unused pin – externally pull up for normal operation Unused pin – externally pull down for normal operation October 2007 20 M9999-101607-1.3 Micrel, Inc. Pin Number 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 Pin Name UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED DGND VDDC UNUSED UNUSED UNUSED TESTEN SCANEN Type(1) I I I I I I I I I I I Gnd P I I I Ipd Ipd Pin Function Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Digital ground 1.2V digital VDD Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Unused pin – externally pull down for normal operation Scan Test Enable For normal operation, pull-down this pin to ground. Scan Test Scan Mux Enable For normal operation, pull-down this pin to ground. KSZ8893FQL Notes: 1. P = Power supply. Gnd = Ground. I = Input. O = Output. I/O = Bi-directional. Ipd = Input with internal pull-down. Ipu = Input with internal pull-up. Opd = Output with internal pull-down. Opu = Output with internal pull-up. Ipd/O = Input with internal pull-down during reset; output pin otherwise. Ipu/O = Input with internal pull-up during reset; output pin otherwise. October 2007 21 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Functional Description The KSZ8893FQL is a single-chip Fast Ethernet media converter. It contains two 10/100 physical layer transceivers and three Media Access Control (MAC) units with an integrated Layer 2 managed switch. On the media side, the KSZ8893FQL supports IEEE 802.3 10Base-T and 100Base-TX on both PHY ports. In Media Converter (MC) applications, PHY port 1 is the fiber port and supports 100Base-FX, 100Base-SX and 10Base-FL. The KSZ8893FQL has the flexibility to reside in either a managed or unmanaged design. In a managed design, the host processor has complete control of the KSZ8893FQL via the SMI interface, MIIM interface, SPI bus, or I2C bus. An unmanaged design is achieved through I/O strapping and/or EEPROM programming at system reset time. Physical signal transmission and reception are enhanced through the use of patented analog circuitries that make the design more efficient and allow for lower power consumption and smaller chip die size. Functional Overview: Media Conversion TS-1000 OAM Operation The KSZ8893FQL implements Japan’s TTC (TELECOMMUNICATION TECHNOLOGY COMMITTEE) TS-1000 version 2, OAM sub-layer, which resides between RS and PCS layer in the IEEE 802.3 Standard. The OAM sub-layer is provided in 100Base-FX mode, and is used by the KSZ8893FQL to send and receive OAM frames. These special frames are used for the transmission of OAM (Operations, Administration, Management) information between center MC and terminal MC. Key TS-1000 OAM features include: • Private point-to-point communication between two TS-1000 compliant devices • 96 bits (12 bytes) frames for the transmission of OAM information between center MC and terminal MC • Transmission of MC status between center MC and terminal MC • Automatic generation of OAM frame to inform MC link partner of local MC’s status change • Transmission of vendor code and model number information between center MC and terminal MC for device identification • Inquisition of terminal MC status by center MC • Remote loop back for diagnostic by center MC OAM Frame Format The TS-1000 OAM (Operations, Administration, and Management) Frame Format is shown on the following page. October 2007 22 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Bit F0–F7 C0 C1 C2–C3 C4–C7 C8–C15 Command Preamble Conservation Delimiter Direction Delimiter Configuration Delimiter Version Control signal S0 S1 S2 S3 S4 S5 S6 S7 S8 Status Power Optical UTP link MC Way for information Loop mode Terminal MC Link option Terminal MC Link Speed1 Terminal MC Link Speed2 S9 Terminal MC Link Duplex S10 Terminal MC Auto-Negotiation capability Multiple link partner Reserve Vendor code Model number FCS S11 S12–S15 M0–M23 M24–M47 E0–E7 Description 1010 1010 0 0: Upstream (from terminal MC to center MC) 1: Downstream (from center MC to terminal MC) 10: request 11:reponse 01: indication 00:reserved 0000 1000 0000: Start loop back test 0000 0000: Stop loop back test 0100 0000: Notify status 0: normal operation 1: power down 0: normal 1:abnormal 0: link up 1: link down 0: normal 1:brake 0: use conservation frame 1: use FEFI 0: normal operation 1: in loop mode 0: Center side MC have to set always “0” 1: Terminal side MC have to set always “1” This bit must be set “0” 0: 10Mbps 1: 100Mbps These bits have to be set “0”, if S2 is “1” (Center side MC have to set always “0”) 0: Half Duplex 1: Full Duplex This bit have to be set “0”, if S2 is “1” (Center side MC have to set always “0”) 0: Not Support Auto-Negotiation 1: Support Auto-Negotiation (Center side MC have to set always “0”) 0: one link partner on UTP side 1: multiple link partner on UTP side All bits must be set “0” Create FCS at this sub-layer (C0-M47) Figure 1. TS-1000 OAM Frame Format October 2007 23 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Media Converter Modes TS-1000 Media Converter (MC) modes are selected and configured using hardware pins: MCHS and MCCS. The MC modes are summarized in the following table and are also shown in the Pin Description and I/O Assignment section. (MCHS, MCCS) Description Normal 3 port switch mode (3 MAC + 2 PHY) MC mode is disabled. Port 1 is either Fiber or UTP. Port 2 is UTP. Port 3 (MII) is enabled. Center MC mode (3 MAC + 2 PHY) MC mode is enabled. Port 1 is Fiber & has Center MC enabled. Port 2 is UTP. Port 3 (MII) is enabled. Terminal MC mode (2 MAC + 2 PHY) MC mode is enabled. Port 1 is Fiber & has Terminal MC enabled. Port 2 is UTP. Port 3 (MII) is disabled. Terminal MC mode (3 MAC + 2 PHY) MC mode is enabled. Port 1 is Fiber & has Terminal MC enabled. Port 2 is UTP. Port 3 (MII) is enabled. (0, 0) (0, 1) (1, 0) (1, 1) Table 1. TS-1000 Media Converter Mode Selection The following figure shows two KSZ8893FQLs connected in a typical center MC to terminal MC application. Figure 2. Typical TS-1000 Media Converter Application October 2007 24 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL MC Loop Back Operation TS-1000 MC loop back operation is initiated and enabled by the center MC. The terminal MC provides the loop back path to return the loop back packet back to the center MC. The KSZ8893FQL in terminal MC mode provides three loop back path options: Port 1 OPT • • • • • • • • • Receive loop back packet from center MC at RXP1/RXM1 input pins of port 1 (fiber). Turn around loop back packet at PMD/PMA of port 1 (fiber). Transmit loop back packet back to center MC from TXP1/TXM1 output pins of port 1 (fiber). Receive loop back packet from center MC at RXP1/RXM1 input pins of port 1 (fiber). Turn around loop back packet at MAC of port 2 (copper). Transmit loop back packet back to center MC from TXP1/TXM1 output pins of port 1 (fiber). Receive loop back packet from center MC at RXP1/RXM1 input pins of port 1 (fiber). Turn around loop back packet at PMD/PMA of port 2 (copper). Transmit loop back packet back to center MC from TXP1/TXM1 output pins of port 1 (fiber). Port 2 MAC Port 2 UTP Figure 3. KSZ8893FQL MC Loop Back Paths October 2007 25 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Dedicated TS-1000 Registers & Pins The KSZ8893FQL provides 32 dedicated registers to support TS-1000 OAM communication in center MC and terminal MC modes. The TS-1000 MC registers are located at 64 to 95 (0x40 to 0x5F), and provide the following functions: • • • • • • • • • PHY address configuration Center MC and Terminal MC configuration OAM frame selection and execution MC loop back setup MC loop back counters for CRC error, timeout, good packet Remote command access Counters for valid MC packet transmitted and received MC (local) - status, vendor code, and model number Link Partner (remote) - status, vendor code, and model number The following table lists the dedicated KSZ8893FQL pins used in center MC and terminal MC modes. Pin 9 10 Signal Name MCHS MCCS Type Ipd Ipd Description Selects center MC and terminal MC modes. See “Media Converter Modes” subsection for details. Power Down Detect – Use by terminal MC to detect a power-down condition or indicate a failure has occurred. 1 = Normal operation 0 = Power down detected After detecting a high-to-low transition on this pin, the KSZ8893FQL then sends out an “Indicate Terminal MC Condition” OAM frame with the S0 status bit set to ‘1’ to inform the center MC that a power down condition or failure has occurred on the terminal MC side. If this pin is implemented, PWRDN (pin 36) needs to be de-asserted (pulled up). Drives low to indicate fault conditions (far-end fault detected, link partner’s fiber or UTP port down), or MC loop back mode. This pin has 8mA drive and can directly drive a LED. Used by terminal MC for MC loop back – strap-in pin to select: 1 = Drop OAM frames and Ethernet frames with the following errors – CRC, undersize, oversize. Loop back Ethernet frames with only good CRC and valid length. 0 = Drop OAM frames only. Loop back all Ethernet frames including those with errors. Used by terminal MC for MC loop back – strap-in pin to select: 1 = Perform MC loop back at PHY of port 1 0 = Perform MC loop back at MAC of port 2 See also register 11 (0x0B) bits[3:2]. Used by terminal MC for Missing Link Indication – strap-in pin to select: 1 = Enable Missing Link feature 0 = Disable Missing Link feature Used by terminal MC for Diagnostic status 1 = Diagnostic fail 0 = Diagnostic normal After detecting a change of state on this pin, the KSZ8893FQL sends out an “Indicate Terminal MC Condition” OAM frame with the S3 status bit set to the state of this pin to inform the center MC that a diagnostic status change has occurred on the terminal MC side. Table 2. Dedicated TS-1000 Pins 11 PDD# Ipu 17 P1FST Opu 18 P1CRCD Ipd 19 P1LPBM Ipd 34 ML_EN Ipd 35 DIAGF Ipd October 2007 26 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL 10Base-FL Operation 10Base-FL operation is supported on port 1 of the KSZ8893FQL. It conforms to clause 15 and 18 of the IEEE802.3 Standard for 10Base-FL fiber operation. Refer to the Standard for details. In a typical application, the KSZ8893FQL provides media conversion from 10Base-FL fiber on port 1 to 10Base-T copper on port 2. Alternatively, port 2 can be substituted with port 3 to directly connect to an external MAC. Physical Interface For 10Base-FL operation, port 1 interfaces with an external fiber module to drive 850nm fiber optic links. The interface connections between the KSZ8893FQL and fiber module are single-ended (common mode). 10Base-FL signal transmission and reception are done on TXM1 (pin 49) and RXM1 (pin 46), respectively. Refer to Micrel reference schematic for recommended interface circuit and termination. Enabling 10Base-FL Mode To enable 10Base-FL mode, tie FXSD1 (pin 44) high to +3.3V and MUX2 (pin 41) low-to-ground. Port 1 should also be configured with auto-negotiation disabled, forced to 10Mbps for the speed, and set to either half or full duplex. Optionally, flow control can be enabled to send out PAUSE frames in full duplex mode. The 10Base-FL settings use the same strapping pins, MIIM registers and port registers as 10Base-T copper. These settings are summarized in the following table. Strapping Pin (#) 10Base-FL Settings Auto-Negotiation (disable only) Speed (10Mbps only) Duplex (half or full) Forced Flow Control (option) P1ANEN (30) P1SPD (31) P1DPX (32) P1FFC (33) MIIM Register #, Bit[#] Reg. 0, Bit[12] Reg. 0, Bit[13] Reg. 0, Bit[8] --Port Register #, Bit[#] Reg. 28, Bit[7] Reg. 28, Bit[6] Reg. 28, Bit[5] Reg. 18, Bit[4] Table 3. 10Base-FL Configuration 100Base-SX Operation 100Base-SX operation is supported on port 1 of the KSZ8893FQL. It conforms to the TIA/EIA-785 Standard for 100Base-SX fiber operation. Refer to the Standard for details. In a typical application, the KSZ8893FQL provides media conversion from 100Base-SX fiber on port 1 to 100Base-TX copper on port 2. Alternatively, port 2 can be substituted with port 3 to directly connect to an external MAC. Physical Interface For 100Base-SX operation, port 1 interfaces with an external fiber module to drive 850nm fiber optic links. The interface connections between the KSZ8893FQL and fiber module are single-ended (common mode). 100Base-SX signal transmission and reception are done on TXM1 (pin 49) and RXM1 (pin 46), respectively. Refer to Micrel’s reference schematic for recommended interface circuit and termination. Enabling 100Base-SX Mode To enable 100Base-SX mode, tie FXSD1 (pin 44) high to +3.3V and MUX2 (pin 41) low-to-ground. Port 1 should also be configured with auto-negotiation disabled, forced to 100Mbps for the speed, and set to either half or full duplex. Optionally, flow control can be enabled to send out PAUSE frames in full duplex mode. The 100Base-SX settings use the same strapping pins, MIIM registers and port registers as 100Base-TX copper. These settings are summarized in the following table. October 2007 27 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Strapping Pin (#) 100Base-SX Settings Auto-Negotiation (disable only) Speed (100Mbps only) Duplex (half or full) Forced Flow Control (option) P1ANEN (30) P1SPD (31) P1DPX (32) P1FFC (33) MIIM Register #, Bit[#] Reg. 0, Bit[12] Reg. 0, Bit[13] Reg. 0, Bit[8] --- Port Register #, Bit[#] Reg. 28, Bit[7] Reg. 28, Bit[6] Reg. 28, Bit[5] Reg. 18, Bit[4] Table 4. 100Base-SX Configuration Functional Overview: Physical Layer Transceiver 100Base-TX Transmit The 100Base-TX transmit function performs parallel-to-serial conversion, 4B/5B coding, scrambling, NRZ-to-NRZI conversion, and MLT3 encoding and transmission. The circuitry starts with a parallel-to-serial conversion, which converts the MII data from the MAC into a 125MHz serial bit stream. The data and control stream is then converted into 4B/5B coding, followed by a scrambler. The serialized data is further converted from NRZ-to-NRZI format, and then transmitted in MLT3 current output. The output current is set by an external 1% 3.01KΩ resistor for the 1:1 transformer ratio. The output signal has a typical rise/fall time of 4ns and complies with the ANSI TP-PMD standard regarding amplitude balance, overshoot, and timing jitter. The wave-shaped 10Base-T output is also incorporated into the 100Base-TX transmitter. 100Base-TX Receive The 100Base-TX receiver function performs adaptive equalization, DC restoration, MLT3-to-NRZI conversion, data and clock recovery, NRZI-to-NRZ conversion, de-scrambling, 4B/5B decoding, and serial-to-parallel conversion. The receiving side starts with the equalization filter to compensate for inter-symbol interference (ISI) over the twisted pair cable. Since the amplitude loss and phase distortion is a function of the cable length, the equalizer must adjust its characteristics to optimize performance. In this design, the variable equalizer makes an initial estimation based on comparisons of incoming signal strength against some known cable characteristics, and then tunes itself for optimization. This is an ongoing process and self-adjusts against environmental changes such as temperature variations. Next, the equalized signal goes through a DC restoration and data conversion block. The DC restoration circuit is used to compensate for the effect of baseline wander and to improve the dynamic range. The differential data conversion circuit converts the MLT3 format back to NRZI. The slicing threshold is also adaptive. The clock recovery circuit extracts the 125MHz clock from the edges of the NRZI signal. This recovered clock is then used to convert the NRZI signal into the NRZ format. This signal is sent through the de-scrambler followed by the 4B/5B decoder. Finally, the NRZ serial data is converted to the MII format and provided as the input data to the MAC. PLL Clock Synthesizer The KSZ8893FQL generates 125MHz, 31.25MHz, 25MHz, and 10MHz clocks for system timing. Internal clocks are generated from an external 25MHz crystal or oscillator. In RMII mode, these internal clocks are generated from an external 50MHz oscillator or system clock. Scrambler/De-scrambler (100Base-TX Only) The purpose of the scrambler is to spread the power spectrum of the signal to reduce electromagnetic interference (EMI) and baseline wander. Transmitted data is scrambled through the use of an 11-bit wide linear feedback shift register (LFSR). The scrambler generates a 2047-bit non-repetitive sequence, and the receiver then de-scrambles the incoming data stream using the same sequence as at the transmitter. October 2007 28 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL 100Base-FX Operation 100Base-FX operation is similar to 100Base-TX operation with the differences being that the scrambler/de-scrambler and MLT3 encoder/decoder are bypassed on transmission and reception. In addition, auto-negotiation is bypassed and auto MDI/MDI-X is disabled. 100Base-FX Signal Detection In 100Base-FX operation, FXSD1 (fiber signal detect), input pin 44, is usually connected to the fiber transceiver SD (signal detect) output pin. 100Base-FX mode is activated when the FXSD1 input pin is greater than 1V. When FXSD1 is between 1V and 1.8V, no fiber signal is detected and a far-end fault (FEF) is generated. When FXSD1 is over 2.2V, the fiber signal is detected. Alternatively, the designer may choose not to implement the FEF feature. In this case, the FXSD1 input pin is tied high to force 100Base-FX mode. 100Base-FX signal detection is summarized in the following table: FXSD1 Input Voltage Less than 0.2V Greater than 1V, but less than 1.8V Mode TX mode FX mode No signal detected Far-end fault generated FX mode Signal detected Greater than 2.2V Table 5. FX and TX Mode Selection To ensure proper operation, a resistive voltage divider is recommended to adjust the fiber transceiver SD output voltage swing to match the FXSD1 pin’s input voltage threshold. 100Base-FX Far-End Fault A far-end fault (FEF) occurs when the signal detection is logically false on the receive side of the fiber transceiver. The KSZ8893FQL detects a FEF when its FXSD1 input is between 1V and 1.8V. When a FEF is detected, the KSZ8893FQL signals its fiber link partner that a FEF has occurred by sending 84 1’s followed by a zero in the idle period between frames. By default, FEF is enabled. FEF can be disabled through register setting. 10Base-T Transmit The 10Base-T driver is incorporated with the 100Base-TX driver to allow for transmission using the same magnetics. They are internally wave-shaped and pre-emphasized into outputs with typical 2.3V amplitude. The harmonic contents are at least 27dB below the fundamental frequency when driven by an all-ones Manchester-encoded signal. 10Base-T Receive On the receive side, input buffers and level detecting squelch circuits are employed. A differential input receiver circuit and a phase-locked loop (PLL) perform the decoding function. The Manchester-encoded data stream is separated into clock signal and NRZ data. A squelch circuit rejects signals with levels less than 400mV or with short pulse widths to prevent noise at the RXP-or-RXM input from falsely triggering the decoder. When the input exceeds the squelch limit, the PLL locks onto the incoming signal and the KSZ8893FQL decodes a data frame. The receiver clock is maintained active during idle periods in between data reception. Fiber LED Driver The device provides a current mode fiber LED driver. The edge enhanced current mode does not require any output wave shaping. The drive current of the fiber LED driver is programmable thru register 138 (0x8A) bit[7:6]. The programmable current values are as follow: October 2007 29 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Reg. 138 (0x8A) bit[7:6] 00 01 10 11 Current Value 60mA 80mA 90mA 40mA Table 6. Programmable Current Values for Fiber LED Driver Post Amplifier The KSZ8893FQL also includes a post amplifier. The post amplifier is intended for interfacing the output of the preamplifier of the PIN diode module. The minimum sensitivity of the post amplifier is 2.5mVrms. Power Management The KSZ8893FQL features a per-port power down mode. To save power, a PHY port that is not in use can be powered down via port control register, or via MIIM PHY register. In addition, there is a full chip power down mode. When activated, the entire chip is powered down. MDI/MDI-X Auto Crossover To eliminate the need for crossover cables between similar devices, the KSZ8893FQL offers HP Auto MDI/MDI-X and Micrel Auto MDI/MDI-X crossover. HP Auto MDI/MDI-X is the default. The auto-sense function detects remote transmit and receive pairs and correctly assigns transmit and receive pairs for the KSZ8893FQL device. This feature is extremely useful when end users are unaware of cable types, and also, saves on an additional uplink configuration connection. The auto-crossover feature can be disabled through the port control registers, or MIIM PHY registers. The IEEE 802.3u standard MDI and MDI-X definitions are: MDI RJ-45 Pins 1 2 3 6 Signals TD+ TDRD+ RDRJ-45 Pins 1 2 3 6 MDI-X Signals RD+ RDTD+ TD- Table 7. MDI/MDI-X Pin Definitions Straight Cable A straight cable connects an MDI device to an MDI-X device, or an MDI-X device to an MDI device. The following diagram depicts a typical straight cable connection between a NIC card (MDI) and a switch, or hub (MDI-X). October 2007 30 M9999-101607-1.3 Micrel, Inc. 10/100 Ethernet Media Dependent Interface 10/100 Ethernet Media Dependent Interface KSZ8893FQL 1 Transmit Pair 2 3 4 Receive Pair 5 6 7 8 Straight Cable 1 Receive Pair 2 3 4 Transmit Pair 5 6 7 8 Modular Connector (RJ-45) NIC Modular Connector (RJ-45) HUB (Repeater or Switch) Figure 4. Typical Straight Cable Connection Crossover Cable A crossover cable connects an MDI device to another MDI device, or an MDI-X device to another MDI-X device. The following diagram shows a typical crossover cable connection between two switches or hubs (two MDI-X devices). 10/100 Ethernet Media Dependent Interface 10/100 Ethernet Media Dependent Interface 1 Receive Pair 2 3 4 Transmit Pair 5 6 7 8 Crossover Cable 1 Receive Pair 2 3 4 Transmit Pair 5 6 7 8 Modular Connector (RJ-45) HUB (Repeater or Switch) Modular Connector (RJ-45) HUB (Repeater or Switch) Figure 5. Typical Crossover Cable Connection October 2007 31 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Auto-Negotiation The KSZ8893FQL conforms to the auto-negotiation protocol, as defined in Clause 28 of the IEEE 802.3u specification. Auto-negotiation allows unshielded twisted pair (UTP) link partners to select the best common mode of operation. In auto-negotiation, link partners advertise their capabilities across the link to each other. If auto-negotiation is not supported or the KSZ8893FQL link partner is forced to bypass auto-negotiation, then the KSZ8893FQL sets its operating mode by observing the signal at its receiver. This is known as parallel detection, and allows the KSZ8893FQL to establish link by listening for a fixed signal protocol in the absence of auto-negotiation advertisement protocol. The link up process is shown in the following flow diagram. Figure 6. Auto-Negotiation and Parallel Operation October 2007 32 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL LinkMD Cable Diagnostics The LinkMD feature utilizes time domain reflectometry (TDR) to analyze the cabling plant for common cabling problems such as open circuits, short circuits and impedance mismatches. LinkMD works by sending a pulse of known amplitude and duration down the MDI and MDI-X pairs and then analyzes the shape of the reflected signal. Timing the pulse duration gives an indication of the distance to the cabling fault with maximum distance of 200m and accuracy of +/- 2m. Internal circuitry displays the TDR information in a user-readable digital format. Note: Cable diagnostics are only valid for copper connections and do not support fiber optic operation. Access LinkMD is initiated by accessing registers {26,27} and {42,43}, the LinkMD Control/Status registers, for ports 1 and 2, respectively; and in conjunction with registers 29 and 45, Port Control Register 13, for ports 1 and 2, respectively. Alternatively, the MIIM PHY registers 0 and 29 can be used for LinkMD access. Usage The following is a sample procedure for using LinkMD with registers {26,27,29} on port 1. 1. Disable auto MDI/MDI-X by writing a ‘1’ to register 29, bit [2] to enable manual control over the differential pair used to transmit the LinkMD pulse. 2. Start cable diagnostic test by writing a ‘1’ to register 26, bit [4]. This enable bit is self-clearing. 3. Wait (poll) for register 26, bit [4] to return a ‘0’; indicating cable diagnostic test is completed. 4. Read cable diagnostic test results in register 26, bits [6:5]. The results are as follows: 00 = normal condition (valid test) 01 = open condition detected in cable (valid test) 10 = short condition detected in cable (valid test) 11 = cable diagnostic test failed (invalid test) The ‘11’ case, invalid test, occurs when the KSZ8893FQL is unable to shut down the link partner. In this instance, the test is not run, since it would be impossible for the KSZ8893FQL to determine if the detected signal is a reflection of the signal generated or a signal from another source. 5. Get distance to fault by concatenating register 26, bit [0] and register 27, bits [7:0], and multiplying the result by a constant of 0.4. The distance to the cable fault can be determined by the following formula: D (distance to cable fault) = 0.4 x {(register 26, bit [0]),(register 27, bits [7:0])} D (distance to cable fault) is expressed in meters. Concatenated value of registers 26 and 27 is converted to decimal before multiplying by 0.4. The constant (0.4) may be calibrated for different cabling conditions, including cables with a velocity of propagation that varies significantly from the norm. For port 2 and for the MIIM PHY registers, LinkMD usage is similar. October 2007 33 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Functional Overview: MAC and Switch Address Lookup The internal lookup table stores MAC addresses and their associated information. It contains a 1K unicast address table plus switching information. The KSZ8893FQL is guaranteed to learn 1K addresses and distinguishes itself from hash-based look-up tables, which depending upon the operating environment and probabilities, may not guarantee the absolute number of addresses it can learn. Learning The internal look-up engine updates its table with a new entry if the following conditions are met: 1. The received packet's Source Address (SA) does not exist in the lookup table. 2. The received packet is good; the packet has no receiving errors, and is of legal length. The lookup engine inserts the qualified SA into the table, along with the port number and time stamp. If the table is full, then the last entry of the table is deleted to make room for the new entry. Migration The internal look-up engine also monitors whether a station has moved. If a station has moved, it will update the table accordingly. Migration occurs when the following conditions are met: 1. The received packet's SA is in the table but the associated source port information is different. 2. The received packet is good; the packet has no receiving errors, and is of legal length. The lookup engine will update the existing record in the table with the new source port information. Aging The look-up engine updates the time stamp information of a record whenever the corresponding SA appears. The time stamp is used in the aging process. If a record is not updated for a period of time, the look-up engine removes the record from the table. The look-up engine constantly performs the aging process and will continuously remove aging records. The aging period is about 200 seconds. This feature can be enabled or disabled through register 3 (0x03) bit [2]. Forwarding The KSZ8893FQL forwards packets using the algorithm that is depicted in the following flowcharts. Figure 7 shows stage one of the forwarding algorithm where the search engine looks up the VLAN ID, static table, and dynamic table for the destination address, and comes up with “port to forward 1” (PTF1). PTF1 is then further modified by spanning tree, IGMP snooping, port mirroring, and port VLAN processes to come up with “port-to-forward 2” (PTF2), as shown in Figure 8. The packet is sent to PTF2. October 2007 34 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Figure 7. Destination Address Lookup Flow Chart, Stage 1 October 2007 35 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Figure 8. Destination Address Resolution Flow Chart, Stage 2 The KSZ8893FQL will not forward the following packets: 1. Error packets These include framing errors, Frame Check Sequence (FCS) errors, alignment errors, and illegally sized packet errors. 2. IEEE802.3x PAUSE frames KSZ8893FQL intercepts these packets and performs full duplex flow control accordingly. 3. "Local" packets Based on destination address (DA) lookup. If the destination port from the look-up table matches the port from which the packet originated, the packet is defined as "local." October 2007 36 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Switching Engine The KSZ8893FQL features a high-performance switching engine that moves data to and from the MACs’ packet buffers. It operates in store and forward mode, while the efficient switching mechanism reduces overall latency. The switching engine has a 32kB internal frame buffer. This buffer pool is shared between all three ports. There are a total of 256 buffers available. Each buffer is sized at 128 bytes. MAC Operation The KSZ8893FQL strictly abides by IEEE 802.3 standards to maximize compatibility. Inter Packet Gap (IPG) If a frame is successfully transmitted, the 96 bits time IPG is measured between the two consecutive MTXEN. If the current packet is experiencing collision, the 96 bits time IPG is measured from MCRS and the next MTXEN. Back-Off Algorithm The KSZ8893FQL implements the IEEE 802.3 standard for the binary exponential back-off algorithm, and optional "aggressive mode" back-off. After 16 collisions, the packet is optionally dropped depending upon the switch configuration for register 4 (0x04) bit [3]. Late Collision If a transmit packet experiences collisions after 512 bit times of the transmission, the packet is dropped. Illegal Frames The KSZ8893FQL discards frames less than 64 bytes, and can be programmed to accept frames up to 1518 bytes, 1536 bytes or 1916 bytes. These maximum frame size settings are programmed in register 4 (0x04). Since the KSZ8893FQL supports VLAN tags, the maximum sizing is adjusted when these tags are present. Full Duplex Flow Control The KSZ8893FQL supports standard IEEE 802.3x flow control frames on both the transmit and the receive sides. On the receive side, if the KSZ8893FQL receives a pause control frame, then the KSZ8893FQL will not transmit the next normal frame until the timer, specified in the pause control frame, expires. If another pause frame is received before the current timer expires, then the timer will be updated with the new value in the second pause frame. During this period (while it is flow controlled), only flow control packets from the KSZ8893FQL are transmitted. On the transmit side, the KSZ8893FQL has intelligent and efficient ways to determine when to invoke flow control. The flow control is based upon availability of the system resources, including available buffers, available transmit queues and available receive queues. The KSZ8893FQL will flow control a port that has just received a packet if the destination port resource is busy. The KSZ8893FQL issues a flow control frame (XOFF), containing the maximum pause time defined by the IEEE 802.3x standard. Once the resource is freed up, the KSZ8893FQL then sends out the other flow control frame (XON) with zero pause time to turn off the flow control (turn on transmission to the port). A hysteresis feature is provided to prevent the flow control mechanism from being constantly activated and deactivated. The KSZ8893FQL flow controls all ports if the receive queue becomes full. Half-Duplex Backpressure A half-duplex backpressure option (not in IEEE 802.3 standards) is also provided. The activation and deactivation conditions are the same as full duplex flow control. If backpressure is required, then the KSZ8893FQL sends preambles to defer the other stations' transmission (carrier sense deference). To avoid jabber and excessive deference (as defined in the 802.3 standard), after a certain time, the KSZ8893FQL discontinues the carrier sense and then raises it again quickly. This short silent time (no carrier sense) prevents other stations from sending out packets thereby keeping other stations in a ‘carrier sense’ deferred state. If the port has packets to send during a backpressure situation, then the carrier sense type backpressure is interrupted and those packets are transmitted instead. If there are no additional packets to send, carrier sense type backpressure is reactivated again until switch resources free up. If a collision occurs, the binary exponential back-off algorithm is October 2007 37 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL skipped and carrier sense is generated immediately, thereby reducing the chance of further collisions and carrier sense is maintained to prevent packet reception. To ensure no packet loss in 10 Base-T or 100 Base-TX half duplex modes, the user must enable the following: 1. Aggressive back-off (register 3 (0x03), bit [0]) 2. No excessive collision drop (register 4 (0x04), bit [3]) Note: These bits are not set as defaults, as this is not the IEEE standard. Broadcast Storm Protection The KSZ8893FQL has an intelligent option to protect the switch system from receiving too many broadcast packets. As the broadcast packets are forwarded to all ports except the source port, an excessive number of switch resources (bandwidth and available space in transmit queues) may be utilized. The KSZ8893FQL has the option to include “multicast packets” for storm control. The broadcast storm rate parameters are programmed globally, and can be enabled or disabled on a per port basis. The rate is based upon a 67ms interval for 100BT and a 500ms interval for 10BT. At the beginning of each interval, the counter is cleared to zero, and the rate limit mechanism starts to count the number of bytes during the interval. The rate definition is described in register 6 (0x06) and 7 (0x07). The default setting is 0x63 (99 decimal). This is equal to a rate of 1%, calculated as follows: 148,800 frames/sec * 67ms/interval * 1% = 99 frames/interval (approx.) = 0x63 Note: 148,800 frames/sec is based on 64-byte block of packets in 100Base-TX with 12 bytes of IPG and 8 bytes of preamble between two packets. MII Interface Operation The Media Independent Interface (MII) is specified in Clause 22 of the IEEE 802.3u Standard. It provides a common interface between physical layer and MAC layer devices. The MII provided by the KSZ8893FQL is connected to the device’s third MAC. The interface contains two distinct groups of signals: one for transmission and the other for reception. The following table describes the signals used by the MII bus. PHY-Mode Connections External MAC Controller Signals MTXEN MTXER MTXD3 MTXD2 MTXD1 MTXD0 MTXC MCOL MCRS MRXDV MRXER MRXD3 MRXD2 MRXD1 MRXD0 MRXC KSZ8893FQL PHY Signals SMTXEN SMTXER SMTXD[3] SMTXD[2] SMTXD[1] SMTXD[0] SMTXC SCOL SCRS SMRXDV (not used) SMRXD[3] SMRXD[2] SMRXD[1] SMRXD[0] SMRXC Pin Descriptions Transmit enable Transmit error Transmit data bit 3 Transmit data bit 2 Transmit data bit 1 Transmit data bit 0 Transmit clock Collision detection Carrier sense Receive data valid Receive error Receive data bit 3 Receive data bit 2 Receive data bit 1 Receive data bit 0 Receive clock Table 8. MII Signals MAC-Mode Connections External PHY Signals MTXEN MTXER MTXD3 MTXD2 MTXD1 MTXD0 MTXC MCOL MCRS MRXDV MRXER MRXD3 MRXD2 MRXD1 MRXD0 MRXC KSZ8893FQL MAC Signals SMRXDV (not used) SMRXD[3] SMRXD[2] SMRXD[1] SMRXD[0] SMRXC SCOL SCRS SMTXEN SMTXER SMTXD[3] SMTXD[2] SMTXD[1] SMTXD[0] SMTXC October 2007 38 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL The MII operates in either PHY mode or MAC mode. The data interface is a nibble wide and runs at one-quarter the network bit rate (not encoded). Additional signals on the transmit side indicate when data is valid or when an error has occurred during transmission. Similarly, the receive side has signals that convey when the data is valid and without physical layer errors. For half-duplex operation, the SCOL signal indicates if a collision has occurred during transmission. The KSZ8893FQL does not provide the MRXER signal for PHY mode operation and the MTXER signal for MAC mode operation. Normally, MRXER indicates a receive error coming from the physical layer device and MTXER indicates a transmit error from the MAC device. Since the switch filters error frames, these MII error signals are not used by the KSZ8893FQL. So, for PHY mode operation, if the device interfacing with the KSZ8893FQL has an MRXER input pin, it needs to be tied low. And, for MAC mode operation, if the device interfacing with the KSZ8893FQL has an MTXER input pin, it also needs to be tied low. RMII Interface Operation The Reduced Media Independent Interface (RMII) specifies a low pin count Media Independent Interface (MII). RMII provides a common interface between physical layer and MAC layer devices, and has the following key characteristics: 1. Supports 10Mbps and 100Mbps data rates. 2. Uses a single 50 MHz clock reference (provided externally). 3. Provides independent 2-bit wide (di-bit) transmit and receive data paths. 4. Contains two distinct groups of signals: one for transmission and the other for reception The RMII provided by the KSZ8893FQL is connected to the device’s third MAC. It complies with the RMII Specification. The following table describes the signals used by the RMII bus. Refer to RMII Specification for full detail on the signal description. RMII Signal Name REF_CLK CRS_DV RXD1 RXD0 TX_EN TXD1 TXD0 RX_ER Direction (with respect to the PHY) Input Output Output Output Input Input Input Output Direction (with respect to the MAC) Input or Output Input Input Input Output Output Output Input (not required) --RMII Signal Description Synchronous 50 MHz clock reference for receive, transmit and control interface Carrier sense/ Receive data valid Receive data bit 1 Receive data bit 0 Transmit enable Transmit data bit 1 Transmit data bit 0 Receive error KSZ8893FQL RMII Signal (direction) REFCLK (input) SMRXDV (output) SMRXD[1] (output) SMRXD[0] (output) SMTXEN (input) SMTXD[1] (input) SMTXD[0] (input) (not used) SMTXER* (input) ------* Connects to RX_ER signal of RMII PHY device Table 9. RMII Signal Description October 2007 39 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL The KSZ8893FQL filters error frames, and thus does not implement the RX_ER output signal. To detect error frames from RMII PHY devices, the SMTXER input signal of the KSZ8893FQL is connected to the RXER output signal of the RMII PHY device. Collision detection is implemented in accordance with the RMII Specification. In RMII mode, tie MII signals, SMTXD[3:2] and SMTXER, to ground if they are not used. The KSZ8893FQL RMII can interface with RMII PHY and RMII MAC devices. The latter allows two KSZ8893FQL devices to be connected back-to-back. The following table shows the KSZ8893FQL RMII pin connections with an external RMII PHY and an external RMII MAC, such as another KSZ8893FQL device. KSZ8893FQL PHY-MAC Connections External KSZ8893FQL MAC Signals PHY Signals REF_CLK CRS_DV RXD1 RXD0 TX_EN TXD1 TXD0 RX_ER REFCLK SMRXDV SMRXD[1] SMRXD[0] SMTXEN SMTXD[1] SMTXD[0] SMTXER KSZ8893FQL MAC-MAC Connections External KSZ8893FQL MAC Signals MAC Signals REFCLK SMRXDV SMRXD[1] SMRXD[0] SMTXEN SMTXD[1] SMTXD[0] (not used) REF_CLK CRS_DV RXD1 RXD0 TX_EN TXD1 TXD0 (not used) Pin Descriptions Reference Clock Carrier sense/ Receive data valid Receive data bit 1 Receive data bit 0 Transmit enable Transmit data bit 1 Transmit data bit 0 Receive error Table 10. RMII Signal Connections SNI (7-Wire) Operation The serial network interface (SNI) or 7-wire is compatible with some controllers used for network layer protocol processing. In SNI mode, the KSZ8893FQL acts like a PHY and the external controller functions as the MAC. The KSZ8893FQL can interface directly with external controllers using the 7-wire interface. These signals are divided into two groups, one for transmission and the other for reception. The signals involved are described in the following table. Pin Descriptions Transmit enable Serial transmit data Transmit clock Collision detection Carrier sense Serial receive data Receive clock External MAC Controller Signals TXEN TXD TXC COL CRS RXD RXC Table 11. SNI Signals KSZ8893FQL PHY Signals SMTXEN SMTXD[0] SMTXC SCOL SMRXDV SMRXD[0] SMRXC The SNI interface is a bit wide data interface and therefore, runs at the network bit rate (not encoded). An additional signal on the transmit side indicates when data is valid. Similarly, the receive side has an indicator that conveys when the data is valid. For half duplex operation, the SCOL signal is used to indicate that a collision has occurred during transmission. October 2007 40 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL MII Management (MIIM) Interface The KSZ8893FQL supports the IEEE 802.3 MII Management Interface, also known as the Management Data Input/Output (MDIO) Interface. This interface allows upper-layer devices to monitor and control the states of the KSZ8893FQL. An external device with MDC/MDIO capability is used to read the PHY status or configure the PHY settings. Further details on the MIIM interface can be found in Clause 22.2.4.5 of the IEEE 802.3u Specification. The MIIM interface consists of the following: • • • A physical connection that incorporates the data line (MDIO) and the clock line (MDC). A specific protocol that operates across the aforementioned physical connection that allows an external controller to communicate with the KSZ8893FQL device. Access to a set of eight 16-bit registers, consisting of six standard MIIM registers [0:5] and two custom MIIM registers [29, 31]. The MIIM Interface can operate up to a maximum clock speed of 5 MHz. The following table depicts the MII Management Interface frame format. Preamble Start of Frame 01 01 Read/Write OP Code 10 01 PHY Address Bits [4:0] AAAAA AAAAA REG Address Bits [4:0] RRRRR RRRRR TA Data Bits [15:0] DDDDDDDD_DDDDDDDD DDDDDDDD_DDDDDDDD Idle Read Write 32 1’s 32 1’s Z0 10 Z Z Table 12. MII Management Interface Frame Format Serial Management Interface (SMI) The SMI is the KSZ8893FQL non-standard MIIM interface that provides access to all KSZ8893FQL configuration registers. This interface allows an external device to completely monitor and control the states of the KSZ8893FQL. The SMI interface consists of the following: • • • A physical connection that incorporates the data line (MDIO) and the clock line (MDC). A specific protocol that operates across the aforementioned physical connection that allows an external controller to communicate with the KSZ8893FQL device. Access to all KSZ8893FQL configuration registers. Register access includes the Global, Port and Advanced Control Registers 0-141 (0x00 – 0x8D), and indirect access to the standard MIIM registers [0:5] and custom MIIM registers [29, 31]. The following table depicts the SMI frame format. Preamble Start of Frame 01 01 Read/Write OP Code 00 00 PHY Address Bits [4:0] 1xRRR 0xRRR REG Address Bits [4:0] RRRRR RRRRR TA Data Bits [15:0] 0000_0000_DDDD_DDDD xxxx_xxxx_DDDD_DDDD Idle Read Write 32 1’s 32 1’s Z0 10 Z Z Table 13. Serial Management Interface (SMI) Frame Format SMI register read access is selected when OP Code is set to “00” and bit 4 of the PHY address is set to ‘1’. SMI register write access is selected when OP Code is set to “00” and bit 4 of the PHY address is set to ‘0’. PHY address bit[3] is undefined for SMI register access, and hence, can be set to either ‘0’ or ‘1’ in read/write operations. To access the KSZ8893FQL registers 0-141 (0x00 – 0x8D), the following applies: • • PHYAD[2:0] and REGAD[4:0] are concatenated to form the 8-bit address; that is, {PHYAD[2:0], REGAD[4:0]} = bits [7:0] of the 8-bit address. Registers are 8 data bits wide. – For read operation, data bits [15:8] are read back as 0’s. – For write operation, data bits [15:8] are not defined, and hence can be set to either ‘0’ or ‘1’. 41 M9999-101607-1.3 October 2007 Micrel, Inc. KSZ8893FQL SMI register access is the same as the MIIM register access, except for the register access requirements presented in this section. Repeater Mode The KSZ8893FQL supports repeater mode in 100Base-TX Half Duplex mode. In repeater mode, all ingress packets are broadcast to the other two ports. MAC address checking and learning are disabled. Repeater mode is enabled by setting register 6 bit[7] to ‘1’. Prior to setting this bit, all three ports need to be configured to 100Base-TX Half Duplex mode. Additionally, both PHY ports need to have auto-negotiation disabled. The latency between the two PHY ports is 270 ns (minimum) and 310 ns (maximum). The 40 ns difference is one clock skew (one 25 MHz clock period) between reception and transmission. Latency is defined as the time from the first bit of the Destination Address (DA) entering the ingress port to the first bit of the DA exiting the egress port. Advanced Switch Functions Spanning Tree Support To support spanning tree, port 3 is designated as the processor port. The other ports (port 1 and port 2), can be configured in one of the five spanning tree states via “transmit enable”, “receive enable” and “learning disable” register settings in registers 18 and 34 for ports 1 and 2, respectively. The following table shows the port setting and software actions taken for each of the five spanning tree states. Disable State The port should not forward or receive any packets. Learning is disabled. Blocking State Only packets to the processor are forwarded. Learning is disabled. Listening State Only packets to and from the processor are forwarded. Learning is disabled. Learning State Only packets to and from the processor are forwarded. Learning is enabled. Forwarding State Packets are forwarded and received normally. Learning is enabled. Port Setting “transmit enable = 0, receive enable = 0, learning disable =1” Port Setting “transmit enable = 0, receive enable = 0, learning disable =1” Port Setting “transmit enable = 0, receive enable = 0, learning disable =1” Port Setting “transmit enable = 0, receive enable = 0, learning disable = 0” Port Setting “transmit enable = 1, receive enable = 1, learning disable = 0” Software Action The processor should not send any packets to the port. The switch may still send specific packets to the processor (packets that match some entries in the “static MAC table” with “overriding bit” set) and the processor should discard those packets. Address learning is disabled on the port in this state. Software Action The processor should not send any packets to the port(s) in this state. The processor should program the “Static MAC table” with the entries that it needs to receive (for example, BPDU packets). The “overriding” bit should also be set so that the switch will forward those specific packets to the processor. Address learning is disabled on the port in this state. Software Action The processor should program the “Static MAC table” with the entries that it needs to receive (for example, BPDU packets). The “overriding” bit should be set so that the switch will forward those specific packets to the processor. The processor may send packets to the port(s) in this state. See “Special Tagging Mode” for details. Address learning is disabled on the port in this state. Software Action The processor should program the “Static MAC table” with the entries that it needs to receive (for example, BPDU packets). The “overriding” bit should be set so that the switch will forward those specific packets to the processor. The processor may send packets to the port(s) in this state. See “Special Tagging Mode” for details. Address learning is enabled on the port in this state. Software Action The processor programs the “Static MAC table” with the entries that it needs to receive (for example, BPDU packets). The “overriding” bit is set so that the switch forwards those specific packets to the processor. The processor can send packets to the port(s) in this state. See “Special Tagging Mode” for details. Address learning is enabled on the port in this state. Table 14. Spanning Tree States October 2007 42 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Special Tagging Mode Special Tagging Mode is designed for spanning tree protocol IGMP snooping and is flexible for use in other applications. Special Tagging, similar to 802.1Q Tagging, requires software to change network drivers to insert/modify/strip/interpret the special tag. This mode is enabled by setting both register 11 bit [0] and register 48 bit [2] to ‘1’. 802.1Q Tag Format TPID (tag protocol identifier, 0x8100) + TCI Special Tag Format STPID (special tag identifier, 0x810 + 4 bit for “port mask”) + TCI Table 15. Special Tagging Mode Format The STPID is only seen and used by the port 3 interface, which should be connected to a processor. Packets from the processor to the switch’s port 3 should be tagged with the STPID and the port mask, defined as follows: “0001”, forward packet to port 1 only “0010”, forward packet to port 2 only “0011”, broadcast packet to port 1 and port 2 Packets with normal tags (“0000” port masks) will use KSZ8893FQL internal MAC table look-up to determine the forwarding port(s). Also, if packets from the processor are not tagged, the KSZ8893FQL will treat them as normal packets and use internal MAC table lookup to determine the forwarding port(s). The KSZ8893FQL uses a non-zero “port mask” to bypass the internal MAC table lookup result, and override any port setting, regardless of port states (disable, blocking, listening, and learning). The table below shows the processor to switch egress rules when dealing with STPID. Ingress Tag Field TX port “tag insertion” TX port “tag removal” Egress Action to Tag Field - Modify tag field to 0x8100 - Recalculate CRC - No change to TCI if not null VID - Replace VID with ingress (port 3) port VID if null VID - (STPID + TCI) will be removed - Padding to 64 bytes if necessary - Recalculate CRC - Modify tag field to 0x8100 - Recalculate CRC - No change to TCI if not null VID - Replace VID with ingress (port 3) port VID if null VID - Modify tag field to 0x8100 - Recalculate CRC - No change to TCI if not null VID - Replace VID with ingress (port 3) port VID if null VID - Determined by the Dynamic MAC Address Table (0x810 + port mask) 0 0 (0x810 + port mask) 0 1 (0x810 + port mask) 1 0 (0x810 + port mask) Not Tagged 1 Don’t care 1 Don’t care Table 16. STPID Egress Rules (Processor to Switch Port 3) October 2007 43 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL For packets from regular ports (port 1 & port 2) to port 3, the port mask is used to tell the processor which port the packets were received on, defined as follows: “0001”, packet from port 1 “0010”, packet from port 2 No port mask values, other than the previous two defined ones, should be received in this direction in Special Tagging Mode. The switch to processor egress rules are defined as follows: Ingress Packets Tagged with 0x8100 + TCI Egress Action to Tag Field - Modify TPID to 0x810 + “port mask”, which indicates source port - No change to TCI if VID is not null - Replace null VID with ingress port VID - Recalculate CRC - Insert TPID to 0x810 + “port mask”, which indicates source port - Insert TCI with ingress port VID - Recalculate CRC Not tagged Table 17. STPID Egress Rules (Switch Port 3 to Processor) IGMP Support For Internet Group Management Protocol (IGMP) support in layer 2, the KSZ8893FQL provides two components: IGMP Snooping The KSZ8893FQL traps IGMP packets and forwards them only to the processor (port 3). The IGMP packets are identified as IP packets (either Ethernet IP packets, or IEEE 802.3 SNAP IP packets) with IP version = 0x4 and protocol version number = 0x2. Multicast Address Insertion in the Static MAC Table Once the multicast address is programmed in the Static MAC Table, the multicast session is trimmed to the subscribed ports, instead of broadcasting to all ports. To enable IGMP support, set register 5 bit [6] to ‘1’. Also, Special Tagging Mode needs to be enabled, so that the processor knows which port the IGMP packet was received on. This is achieved by setting both register 11 bit [0] and register 48 bit [2] to ‘1’. IPv6 MLD Snooping The KSZ8893FQL traps IPv6 Multicast Listener Discovery (MLD) packets and forwards them only to processor (port 3). MLD snooping is controlled by register 5 bit 5 (MLD snooping enable) and register 5 bit 4 (MLD option). With MLD snooping enabled, the KSZ8893FQL traps packets that meet all of the following conditions: • • IPv6 multicast packets Hop count limit = 1 • IPv6 next header = 1 or 58 (or = 0 with hop-by-hop next header = 1 or 58) If the MLD option bit is set to “1”, the KSZ8893FQL traps packets with the following additional condition: • IPv6 next header = 43, 44, 50, 51, or 60 (or = 0 with hop-by-hop next header = 43, 44, 50, 51, or 60) For MLD snooping, Special Tagging Mode also needs to be enabled, so that the processor knows which port the MLD packet was received on. This is achieved by setting both register 11 bit [0] and register 48 bit [2] to ‘1’. Port Mirroring Support KSZ8893FQL supports “Port Mirroring” comprehensively as: “receive only” mirror on a port All the packets received on the port are mirrored on the sniffer port. For example, port 1 is programmed to be “receive sniff” and port 3 is programmed to be the “sniffer port”. A packet received on port 1 is destined to port 2 after the internal lookup. The KSZ8893FQL forwards the packet to both port 2 and port 3. The KSZ8893FQL can optionally even forward “bad” received packets to the “sniffer port”. October 2007 44 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL “transmit only” mirror on a port All the packets transmitted on the port are mirrored on the sniffer port. For example, port 1 is programmed to be “transmit sniff” and port 3 is programmed to be the “sniffer port”. A packet received on port 2 is destined to port 1 after the internal lookup. The KSZ8893FQL forwards the packet to both port 1 and port 3. “receive and transmit” mirror on two ports All the packets received on port A and transmitted on port B are mirrored on the sniffer port. To turn on the “AND” feature, set register 5 bit [0] to ‘1’. For example, port 1 is programmed to be “receive sniff”, port 2 is programmed to be “transmit sniff”, and port 3 is programmed to be the “sniffer port”. A packet received on port 1 is destined to port 2 after the internal lookup. The KSZ8893FQL forwards the packet to both port 2 and port 3. Multiple ports can be selected as “receive sniff” or “transmit sniff”. In addition, any port can be selected as the “sniffer port”. All these per port features can be selected through registers 17, 33 and 49 for ports 1, 2 and 3, respectively. IEEE 802.1Q VLAN Support The KSZ8893FQL supports 16 active VLANs out of the 4096 possible VLANs specified in the IEEE 802.1Q specification. KSZ8893FQL provides a 16-entry VLAN Table, which converts the 12-bits VLAN ID (VID) to the 4-bits Filter ID (FID) for address lookup. If a non-tagged or null-VID-tagged packet is received, the ingress port default VID is used for look-up. In VLAN mode, the look-up process starts with VLAN Table lookup to determine whether the VID is valid. If the VID is not valid, the packet is dropped and its address is not learned. If the VID is valid, the FID is retrieved for further lookup. The FID + Destination Address (FID+DA) are used to determine the destination port. The FID + Source Address (FID+SA) are used for address learning. DA found in Static MAC Table? No No Yes Yes Yes Yes Use FID flag? Don’t care Don’t care 0 1 1 1 FID match? Don’t care Don’t care Don’t care No No Yes DA+FID found in Dynamic MAC Table? No Yes Don’t care No Yes Don’t care Action Broadcast to the membership ports defined in the VLAN Table bits [18:16] Send to the destination port defined in the Dynamic MAC Address Table bits [53:52] Send to the destination port(s) defined in the Static MAC Address Table bits [50:48] Broadcast to the membership ports defined in the VLAN Table bits [18:16] Send to the destination port defined in the Dynamic MAC Address Table bits [53:52] Send to the destination port(s) defined in the Static MAC Address Table bits [50:48] Table 18. FID+DA Lookup in VLAN Mode FID+SA found in Dynamic MAC Table? No Yes Action Learn and add FID+SA to the Dynamic MAC Address Table Update time stamp Table 19. FID+SA Lookup in VLAN Mode Advanced VLAN features, such as “Ingress VLAN filtering” and “Discard Non PVID packets” are also supported by the KSZ8893FQL. These features can be set on a per port basis, and are defined in register 18, 34 and 50 for ports 1, 2 and 3, respectively. October 2007 45 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL QoS Priority Support The KSZ8893FQL provides Quality of Service (QoS) for applications such as VoIP and video conferencing. Offering four priority queues per port, the per-port transmit queue can be split into four priority queues: Queue 3 is the highest priority queue and Queue 0 is the lowest priority queue. Bit [0] of registers 16, 32 and 48 is used to enable split transmit queues for ports 1, 2 and 3, respectively. If a port's transmit queue is not split, high priority and low priority packets have equal priority in the transmit queue. There is an additional option to either always deliver high priority packets first or use weighted fair queuing for the four priority queues. This global option is set and explained in bit [3] of register 5. Port-Based Priority With port-based priority, each ingress port is individually classified as a high priority receiving port. All packets received at the high priority receiving port are marked as high priority and are sent to the high-priority transmit queue if the corresponding transmit queue is split. Bits [4:3] of registers 16, 32 and 48 are used to enable port-based priority for ports 1, 2 and 3, respectively. 802.1p-Based Priority For 802.1p-based priority, the KSZ8893FQL examines the ingress (incoming) packets to determine whether they are tagged. If tagged, the 3-bit priority field in the VLAN tag is retrieved and compared against the “priority mapping” value, as specified by the registers 12 and 13. The “priority mapping” value is programmable. The following figure illustrates how the 802.1p priority field is embedded in the 802.1Q VLAN tag. Figure 9. 802.1p Priority Field Format 802.1p-based priority is enabled by bit [5] of registers 16, 32 and 48 for ports 1, 2 and 3, respectively. The KSZ8893FQL provides the option to insert or remove the priority tagged frame's header at each individual egress port. This header, consisting of the 2 bytes VLAN Protocol ID (VPID) and the 2-byte Tag Control Information field (TCI), is also referred to as the IEEE 802.1Q VLAN tag. Tag Insertion is enabled by bit [2] of registers 16, 32 and 48 for ports 1, 2 and 3, respectively. At the egress port, untagged packets are tagged with the ingress port’s default tag. The default tags are programmed in register sets {19,20}, {35,36} and {51,52} for ports 1, 2 and 3, respectively. The KSZ8893FQL will not add tags to already tagged packets. Tag Removal is enabled by bit [1] of registers 16, 32 and 48 for ports 1, 2 and 3, respectively. At the egress port, tagged packets will have their 802.1Q VLAN Tags removed. The KSZ8893FQL will not modify untagged packets. The CRC is recalculated for both tag insertion and tag removal. 802.1p Priority Field Re-mapping is a QoS feature that allows the KSZ8893FQL to set the “User Priority Ceiling” at any ingress port. If the ingress packet’s priority field has a higher priority value than the default tag’s priority field of the ingress port, the packet’s priority field is replaced with the default tag’s priority field. The “User Priority Ceiling” is enabled by bit [3] of registers 17, 33 and 49 for ports 1, 2 and 3, respectively. October 2007 46 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL DiffServ-Based Priority DiffServ-based priority uses the ToS registers (registers 96 to 111) in the Advanced Control Registers section. The ToS priority control registers implement a fully decoded, 64-bit Differentiated Services Code Point (DSCP) register to determine packet priority from the 6-bit ToS field in the IP header. When the most significant 6 bits of the ToS field are fully decoded, the resultant of the 64 possibilities is compared with the corresponding bits in the DSCP register to determine priority. Rate Limiting Support The KSZ8893FQL supports hardware rate limiting from 64 Kbps to 88 Mbps, independently on the “receive side” and on the “transmit side” on a per port basis. For 10Base-T, a rate setting above 10 Mbps means the rate is not limited. On the receive side, the data receive rate for each priority at each port can be limited by setting up Ingress Rate Control Registers. On the transmit side, the data transmit rate for each priority queue at each port can be limited by setting up Egress Rate Control Registers. The size of each frame has options to include minimum IFG (Inter Frame Gap) or Preamble byte, in addition to the data field (from packet DA to FCS). For ingress rate limiting, KSZ8893FQL provides options to selectively choose frames from all types, multicast, broadcast, and flooded unicast frames. The KSZ8893FQL counts the data rate from those selected type of frames. Packets are dropped at the ingress port when the data rate exceeds the specified rate limit. For egress rate limiting, the Leaky Bucket algorithm is applied to each output priority queue for shaping output traffic. Inter frame gap is stretched on a per frame base to generate smooth, non-burst egress traffic. The throughput of each output priority queue is limited by the egress rate specified. If any egress queue receives more traffic than the specified egress rate throughput, packets may be accumulated in the output queue and packet memory. After the memory of the queue or the port is used up, packet dropping or flow control will be triggered. As a result of congestion, the actual egress rate may be dominated by flow control/dropping at the ingress end, and may be therefore, slightly less than the specified egress rate. To reduce congestion, it is a good practice to make sure the egress bandwidth exceeds the ingress bandwidth. Unicast MAC Address Filtering The unicast MAC address filtering function works in conjunction with the static MAC address table. First, the static MAC address table is used to assign a dedicated MAC address to a specific port. If a unicast MAC address is not recorded in the static table, it is also not learned in the dynamic MAC table. The KSZ8893FQL is then configured with the option to either filter or forward unicast packets for an unknown MAC address. This option is enabled and configured in register 14. This function is useful in preventing the broadcast of unicast packets that could degrade the quality of the port in applications such as voice over Internet Protocol (VoIP). Configuration Interface The KSZ8893FQL can operate as both a managed switch and an unmanaged switch. In unmanaged mode, the KSZ8893FQL is typically programmed using an EEPROM. If no EEPROM is present, the KSZ8893FQL is configured using its default register settings. Some default settings are configured via strap-in pin options. The strap-in pins are indicated in the “KSZ8893FQL Pin Description and I/O Assignment” table. I2C Master Serial Bus Configuration With an additional I2C (“2-wire”) EEPROM, the KSZ8893FQL can perform more advanced switch features like “broadcast storm protection” and “rate control” without the need of an external processor. For KSZ8893FQL I2C Master configuration, the EEPROM stores the configuration data for register 0 to register 120 (as defined in the KSZ8893FQL register map) with the exception of the “Read Only” status registers. After the de-assertion of reset, the KSZ8893FQL sequentially reads in the configuration data for all 121 registers, starting from register 0. The configuration access time (tprgm) is less than 15 ms, as depicted in the following figure. October 2007 47 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Figure 10. KSZ8893FQL EEPROM Configuration Timing Diagram. The following is a sample procedure for programming the KSZ8893FQL with a pre-configured EEPROM: 1. Connect the KSZ8893FQL to the EEPROM by joining the SCL and SDA signals of the respective devices. For the KSZ8893FQL, SCL is pin 97 and SDA is pin 98. 2. Enable I2C master mode by setting the KSZ8893FQL strap-in pins, PS[1:0] (pins 100 and 101, respectively) to “00”. 3. Check to ensure that the KSZ8893FQL reset signal input, RST_N (pin 67), is properly connected to the external reset source at the board level. 4. Program the desired configuration data into the EEPROM. 5. Place the EEPROM on the board and power up the board. 6. Assert an active-low reset to the RST_N pin of the KSZ8893FQL. After reset is de-asserted, the KSZ8893FQL begins reading the configuration data from the EEPROM. The KSZ8893FQL checks that the first byte read from the EEPROM is “88”. If this value is correct, EEPROM configuration continues. If not, EEPROM configuration access is denied and all other data sent from the EEPROM is ignored by the KSZ8893FQL. The configuration access time (tprgm) is less than 15ms. Note: For proper operation, check to ensure that the KSZ8893FQL PWRDN input signal (pin 36) is not asserted during the reset operation. The PWRDN input is active low. I2C Slave Serial Bus Configuration In managed mode, the KSZ8893FQL can be configured as an I2C slave device. In this mode, an I2C master device (external controller/CPU) has complete programming access to the KSZ8893FQL’s 142 registers. Programming access includes the Global Registers, Port Registers, Advanced Control Registers and indirect access to the “Static MAC Table”, “VLAN Table”, “Dynamic MAC Table,” and “MIB Counters.” The tables and counters are indirectly accessed via registers 121 to 131. In I2C slave mode, the KSZ8893FQL operates like other I2C slave devices. Addressing the KSZ8893FQL’s 8-bit registers is similar to addressing Atmel’s AT24C02 EEPROM’s memory locations. Details of I2C read/write operations and related timing information can be found in the AT24C02 Datasheet. Two fixed 8-bit device addresses are used to address the KSZ8893FQL in I2C slave mode. One is for read; the other is for write. The addresses are as follow: 1011_1111 1011_1110 The following is a sample procedure for programming the KSZ8893FQL using the I2C slave serial bus: 1. Enable I2C slave mode by setting the KSZ8893FQL strap-in pins PS[1:0] (pins 100 and 101, respectively) to “01”. 2. Power up the board and assert reset to the KSZ8893FQL. After reset, the “Start Switch” bit (register 1 bit [0]) is set to ‘0’. 3. Configure the desired register settings in the KSZ8893FQL, using the I2C write operation. October 2007 48 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL 4. Read back and verify the register settings in the KSZ8893FQL, using the I2C read operation. 5. Write a ‘1’ to the “Start Switch” bit to start the KSZ8893FQL with the programmed settings. Note: The “Start Switch” bit cannot be set to ‘0’ to stop the switch after a ‘1’ is written to this bit. Thus, it is recommended that all switch configuration settings are programmed before the “Start Switch” bit is set to ‘1’. Some of the configuration settings, such as “Aging enable”, “Auto Negotiation Enable”, “Force Speed” and “Power down” can be programmed after the switch has been started. SPI Slave Serial Bus Configuration In managed mode, the KSZ8893FQL can be configured as a SPI slave device. In this mode, a SPI master device (external controller/CPU) has complete programming access to the KSZ8893FQL’s 142 registers. Programming access includes the Global Registers, Port Registers, Advanced Control Registers and indirect access to the “Static MAC Table”, “VLAN Table”, “Dynamic MAC Table” and “MIB Counters”. The tables and counters are indirectly accessed via registers 121 to 131. The KSZ8893FQL supports two standard SPI commands: ‘0000_0011’ for data read and ‘0000_0010’ for data write. SPI multiple read and multiple write are also supported by the KSZ8893FQL to expedite register read back and register configuration, respectively. SPI multiple read is initiated when the master device continues to drive the KSZ8893FQL SPIS_N input pin (SPI Slave Select signal) low after a byte (a register) is read. After the read, the KSZ8893FQL’s internal address counter increments automatically to the next byte (next register). The next byte at the next register address is shifted out onto the KSZ8893FQL SPIQ output pin. SPI multiple read continues until the SPI master device terminates it by de-asserting the SPIS_N signal to the KSZ8893FQL. Similarly, SPI multiple write is initiated when the master device continues to drive the KSZ8893FQL SPIS_N input pin low after a byte (a register) is written. The KSZ8893FQL internal address counter increments automatically to the next byte (next register) after the write. The next byte that is sent from the master device to the KSZ8893FQL SDA input pin is written to the next register address. SPI multiple write continues until the SPI master device terminates it by deasserting the SPIS_N signal to the KSZ8893FQL. For both SPI multiple read and multiple write, the KSZ8893FQL internal address counter wraps back to register address zero once the highest register address is reached. This feature allows all 142 KSZ8893FQL registers to be read, or written with a single SPI command from any initial register address. The KSZ8893FQL is capable of supporting a 5MHz SPI bus. The following is a sample procedure for programming the KSZ8893FQL using the SPI bus: 1. At the board level, connect the KSZ8893FQL pins as follows: KSZ8893FQL Pin # 99 97 98 96 KSZ8893FQL Signal Name SPIS_N SCL (SPIC) SDA (SPID) SPIQ External Processor Signal Description SPI Slave Select SPI Clock SPI Data (Master output; Slave input) SPI Data (Master input; Slave output) Table 20. KSZ8893FQL SPI Connections 2. Enable SPI slave mode by setting the KSZ8893FQL strap-in pins PS[1:0] (pins 100 and 101, respectively) to “10”. 3. Power up the board and assert reset to the KSZ8893FQL. After reset, the “Start Switch” bit (register 1 bit [0]) is set to ‘0’. 4. Configure the desired register settings in the KSZ8893FQL, using the SPI write or multiple write command. 5. Read back and verify the register settings in the KSZ8893FQL, using the SPI read or multiple read command. 6. Write a ‘1’ to the “Start Switch” bit to start the KSZ8893FQL with the programmed settings. October 2007 49 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Note: The “Start Switch” bit cannot be set to ‘0’ to stop the switch after a ‘1’ is written to this bit. Thus, it is recommended that all switch configuration settings are programmed before the “Start Switch” bit is set to ‘1’. Some of the configuration settings, such as “Aging enable”, “Auto Negotiation Enable”, “Force Speed” and “Power down” can be programmed after the switch has been started. The following four figures illustrate the SPI data cycles for “Write”, “Read”, “Multiple Write” and “Multiple Read”. The read data is registered out of SPIQ on the falling edge of SPIC, and the data input on SPID is registered on the rising edge of SPIC. Figure 11. SPI Write Data Cycle Figure 12. SPI Read Data Cycle October 2007 50 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Figure 13. SPI Multiple Write Figure 14. SPI Multiple Read October 2007 51 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Loopback Support The KSZ8893FQL provides loopback support for remote diagnostic of failure. In loopback mode, the speed at both PHY ports needs to be set to 100Base-TX. Two types of loopback are supported: Far-end Loopback and Near-end (Remote) Loopback. Far-end Loopback Far-end loopback is conducted between the KSZ8893FQL’s two PHY ports. The loopback path starts at the “Originating.” PHY port’s receive inputs (RXP/RXM), wraps around at the “loopback” PHY port’s PMD/PMA, and ends at the “Originating” PHY port’s transmit outputs (TXP/TXM). Bit [0] of registers 29 and 45 is used to enable far-end loopback for ports 1 and 2, respectively. Alternatively, the MII Management register 0, bit [14] can be used to enable far-end loopback. The far-end loopback path is illustrated in the following figure. Figure 15. Far-End Loopback Path October 2007 52 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Near-end (Remote) Loopback Near-end (Remote) loopback is conducted at either PHY port 1 or PHY port 2.of the KSZ8893FQL. The loopback path starts at the PHY port’s receive inputs (RXPx/RXMx), wraps around at the same PHY port’s PMD/PMA, and ends at the PHY port’s transmit outputs (TXPx/TXMx). Bit [1] of registers 26 and 42 is used to enable near-end loopback for ports 1 and 2, respectively. Alternatively, the MII Management register 31, bit [1] can be used to enable near-end loopback. The near-end loopback paths are illustrated in the following figure. Figure 16. Near-end (Remote) Loopback Path. October 2007 53 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL MII Management (MIIM) Registers The MIIM interface is used to access the MII PHY registers defined in this section. The SPI, I2C, and SMI interfaces can also be used to access some of these registers. The latter three interfaces use a different mapping mechanism than the MIIM interface. The “PHYADs” by defaults are assigned “0x1” for PHY1 (port 1) and “0x2” for PHY2 (port 2). Additionally, these “PHYADs” can be programmed to the PHY addresses specified in bits[7:3] of Register 15 (0x0F): Global Control 13. The “REGAD” supported are 0x0-0x5, 0x1D and 0x1F. Register Name PHYAD = 0x1, REGAD = 0x0 PHYAD = 0x1, REGAD = 0x1 PHYAD = 0x1, REGAD = 0x2 PHYAD = 0x1, REGAD = 0x3 PHYAD = 0x1, REGAD = 0x4 PHYAD = 0x1, REGAD = 0x5 PHYAD = 0x1, 0x6 – 0x1C PHYAD = 0x1, 0x1D PHYAD = 0x1, 0x1E PHYAD = 0x1, 0x1F PHYAD = 0x2, REGAD = 0x0 PHYAD = 0x2, REGAD = 0x1 PHYAD = 0x2, REGAD = 0x2 PHYAD = 0x2, REGAD = 0x3 PHYAD = 0x2, REGAD = 0x4 PHYAD = 0x2, REGAD = 0x5 PHYAD = 0x2, 0x6 – 0x1C PHYAD = 0x2, 0x1D PHYAD = 0x2, 0x1E PHYAD = 0x2, 0x1F Description PHY1 Basic Control Register PHY1 Basic Status Register PHY1 Physical Identifier I PHY1 Physical Identifier II PHY1 Auto-Negotiation Advertisement Register PHY1 Auto-Negotiation Link Partner Ability Register PHY1 Not supported PHY1 LinkMD Control/Status PHY1 Not supported PHY1 Special Control/Status PHY2 Basic Control Register PHY2 Basic Status Register PHY2 Physical Identifier I PHY2 Physical Identifier II PHY2 Auto-Negotiation Advertisement Register PHY2 Auto-Negotiation Link Partner Ability Register PHY2 Not supported PHY2 LinkMD Control/Status PHY2 Not supported PHY2 Special Control/Status October 2007 54 M9999-101607-1.3 Micrel, Inc. PHY1 Register 0 (PHYAD = 0x1, REGAD = 0x0): MII Basic Control PHY2 Register 0 (PHYAD = 0x2, REGAD = 0x0): MII Basic Control Bit 15 14 Name Soft reset Loopback R/W RO R/W Description NOT SUPPORTED 1 = Perform loopback, as indicated: Port 1 Loopback (reg. 29, bit 0 = ‘1’) Start: RXP2/RXM2 (port 2) Loopback: PMD/PMA of port 1’s PHY End: TXP2/TXM2 (port 2) Port 2 Loopback (reg. 45, bit 0 = ‘1’) Start: RXP1/RXM1 (port 1) Loopback: PMD/PMA of port 2’s PHY End: TXP1/TXM1 (port 1) 0 = Normal operation 1 = 100 Mbps 0 = 10 Mbps 1 = Auto-negotiation enabled 0 = Auto-negotiation disabled 1 = Power down 0 = Normal operation NOT SUPPORTED 1 = Restart auto-negotiation 0 = Normal operation 1 = Full duplex 0 = Half duplex NOT SUPPORTED 1 = HP Auto MDI/MDI-X mode 0 = Micrel Auto MDI/MDI-X mode 1 = Force MDI (transmit on RXP / RXM pins) 0 = Normal operation (transmit on TXP / TXM pins) 1 = Disable auto MDI-X 0 = Enable auto MDI-X 1 = Disable far-end fault detection 0 = Normal operation 1 = Disable transmit 0 = Normal operation 1 = Disable LED 0 = Normal operation Default 0 0 KSZ8893FQL Reference Reg. 29, bit 0 Reg. 45, bit 0 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Force 100 AN enable Power down Isolate Restart AN Force full duplex Collision test Reserved Hp_mdix Force MDI Disable MDIX Disable far-end fault Disable transmit Disable LED R/W R/W R/W RO R/W R/W RO RO R/W R/W R/W R/W R/W R/W 0 1 0 0 0 0 0 0 1 0 0 0 0 0 Reg. 28, bit 6 Reg. 44, bit 6 Reg. 28, bit 7 Reg. 44, bit 7 Reg. 29, bit 3 Reg. 45, bit 3 Reg. 29, bit 5 Reg. 45, bit 5 Reg. 28, bit 5 Reg. 44, bit 5 Reg. 31, bit 7 Reg. 47, bit 7 Reg. 29, bit 1 Reg. 45, bit 1 Reg. 29, bit 2 Reg. 45, bit 2 Reg. 29, bit 4 Reg. 29, bit 6 Reg. 45, bit 6 Reg. 29, bit 7 Reg. 45, bit 7 October 2007 55 M9999-101607-1.3 Micrel, Inc. PHY1 Register 1 (PHYAD = 0x1, REGAD = 0x1): MII Basic Status PHY2 Register 1 (PHYAD = 0x2, REGAD = 0x1): MII Basic Status Bit 15 14 13 12 11 10-7 6 5 4 3 2 1 0 Name T4 capable 100 Full capable 100 Half capable 10 Full capable 10 Half capable Reserved Preamble suppressed AN complete Far-end fault AN capable Link status Jabber test Extended capable R/W RO RO RO RO RO RO RO RO RO RO RO RO RO Description 0 = Not 100 Base-T4 capable 1 = 100Base-TX full duplex capable 0 = Not capable of 100Base-TX full duplex 1 = 100Base-TX half duplex capable 0 = Not 100Base-TX half duplex capable 1 = 10Base-T full duplex capable 0 = Not 10Base-T full duplex capable 1 = 10Base-T half duplex capable 0 = Not 10Base-T half duplex capable NOT SUPPORTED 1 = Auto-negotiation complete 0 = Auto-negotiation not completed 1 = Far-end fault detected 0 = No far-end fault detected 1 = Auto-negotiation capable 0 = Not auto-negotiation capable 1 = Link is up 0 = Link is down NOT SUPPORTED 0 = Not extended register capable Default 0 1 1 1 1 0000 0 0 0 1 0 0 0 KSZ8893FQL Reference Always 1 Always 1 Always 1 Always 1 Reg. 30, bit 6 Reg. 46, bit 6 Reg. 31, bit 0 Reg. 28, bit 7 Reg. 44, bit 7 Reg. 30, bit 5 Reg. 46, bit 5 PHY1 Register 2 (PHYAD = 0x1, REGAD = 0x2): PHYID High PHY2 Register 2 (PHYAD = 0x2, REGAD = 0x2): PHYID High Bit 15-0 Name PHYID high R/W RO Description High order PHYID bits Default 0x0022 PHY1 Register 3 (PHYAD = 0x1, REGAD = 0x3): PHYID Low PHY2 Register 3 (PHYAD = 0x2, REGAD = 0x3): PHYID Low Bit 15-0 Name PHYID low R/W RO Description Low order PHYID bits Default 0x1430 October 2007 56 M9999-101607-1.3 Micrel, Inc. PHY1 Register 4 (PHYAD = 0x1, REGAD = 0x4): Auto-Negotiation Advertisement Ability PHY2 Register 4 (PHYAD = 0x2, REGAD = 0x4): Auto-Negotiation Advertisement Ability Bit 15 14 13 12-11 10 9 8 7 6 5 4-0 Name Next page Reserved Remote fault Reserved Pause Reserved Adv 100 Full Adv 100 Half Adv 10 Full Adv 10 Half Selector field R/W RO RO RO RO R/W R/W R/W R/W R/W R/W RO Description NOT SUPPORTED NOT SUPPORTED 1 = Advertise pause ability 0 = Do not advertise pause ability 1 = Advertise 100 full duplex ability 0 = Do not advertise 100 full duplex ability 1 = Advertise 100 half duplex ability 0 = Do not advertise 100 half duplex ability 1 = Advertise 10 full duplex ability 0 = Do not advertise 10 full duplex ability 1 = Advertise 10 half duplex ability 0 = Do not advertise 10 half duplex ability 802.3 Default 0 0 0 00 1 0 1 1 1 1 00001 KSZ8893FQL Reference Reg. 28, bit 4 Reg. 44, bit 4 Reg. 28, bit 3 Reg. 44, bit 3 Reg. 28, bit 2 Reg. 44, bit 2 Reg. 28, bit 1 Reg. 44, bit 1 Reg. 28, bit 0 Reg. 44, bit 0 PHY1 Register 5 (PHYAD = 0x1, REGAD = 0x5): Auto-Negotiation Link Partner Ability PHY2 Register 5 (PHYAD = 0x2, REGAD = 0x5): Auto-Negotiation Link Partner Ability Bit 15 14 13 12-11 10 9 8 7 6 5 4-0 Name Next page LP ACK Remote fault Reserved Pause Reserved Adv 100 Full Adv 100 Half Adv 10 Full Adv 10 Half Reserved R/W RO RO RO RO RO RO RO RO RO RO RO Description NOT SUPPORTED NOT SUPPORTED NOT SUPPORTED Link partner pause capability Default 0 0 0 00 0 0 0 0 0 0 00000 Reference Reg. 30, bit 4 Reg. 46, bit 4 Reg. 30, bit 3 Reg. 46, bit 3 Reg. 30, bit 2 Reg. 46, bit 2 Reg. 30, bit 1 Reg. 46, bit 1 Reg. 30, bit 0 Reg. 46, bit 0 Link partner 100 full capability Link partner 100 half capability Link partner 10 full capability Link partner 10 half capability October 2007 57 M9999-101607-1.3 Micrel, Inc. PHY1 Register 29 (PHYAD = 0x1, REGAD = 0x1D): LinkMD Control/Status PHY2 Register 29 (PHYAD = 0x2, REGAD = 0x1D): LinkMD Control/Status Bit 15 Name Vct_enable R/W R/W (SC) Description 1 = Enable cable diagnostic. After VCT test has completed, this bit will be self-cleared. 0 = Indicate cable diagnostic test (if enabled) has completed and the status information is valid for read. 00 = Normal condition 01 = Open condition detected in cable 10 = Short condition detected in cable 11 = Cable diagnostic test has failed 1 = Less than 10 meter short Reserved Distance to the fault. It’s approximately 0.4m*vct_fault_count[8:0] Default 0 KSZ8893FQL Reference Reg. 26, bit 4 Reg. 42, bit 4 14-13 Vct_result RO 00 Reg 26, bit[6:5] Reg 42, bit[6:5] 12 11-9 8-0 Vct 10M Short Reserved Vct_fault_count RO RO RO 0 000 {0, (0x00)} Reg. 26, bit 7 Reg. 42, bit 7 {(Reg. 26, bit 0), (Reg. 27, bit[7:0])} {(Reg. 42, bit 0), (Reg. 43, bit[7:0])} PHY1 Register 31 (PHYAD = 0x1, REGAD = 0x1F): PHY Special Control/Status PHY2 Register 31 (PHYAD = 0x2, REGAD = 0x1F): PHY Special Control/Status Bit 15-6 5 4 3 2 1 Name Reserved Polrvs MDI-X status Force_lnk Pwrsave Remote Loopback R/W RO RO RO R/W R/W R/W Description Reserved 1 = Polarity is reversed 0 = Polarity is not reversed 1 = MDI-X 0 = MDI 1 = Force link pass 0 = Normal Operation 0 = Enable power saving 1 = Disable power saving 1 = Perform Remote loopback, as follows: Port 1 (reg. 26, bit 1 = ‘1’) Start: RXP1/RXM1 (port 1) Loopback: PMD/PMA of port 1’s PHY End: TXP1/TXM1 (port 1) Port 2 (reg. 42, bit 1 = ‘1’) Start: RXP2/RXM2 (port 2) Loopback: PMD/PMA of port 2’s PHY End: TXP2/TXM2 (port 2) 0 = Normal Operation Reserved Do not change the default value. Default {(0x00), 00} 0 0 0 1 0 Reference Reg. 31, bit 5 Reg. 47, bit 5 Reg. 30, bit 7 Reg. 46, bit 7 Reg. 26, bit 3 Reg. 42, bit 3 Reg. 26, bit 2 Reg. 42, bit 2 Reg. 26, bit 1 Reg. 42, bit 1 0 Reserved R/W 0 October 2007 58 M9999-101607-1.3 Micrel, Inc. KSZ8893FQL Register Map: Switch, PHY, TS-1000 Media Converter (8-bit registers) Global Registers Register (Decimal) 0-1 2-15 Register (Hex) 0x00-0x01 0x02-0x0F Description Chip ID Registers Global Control Registers Port Registers Register (Decimal) 16-29 30-31 32-45 46-47 48-57 58-62 63 Register (Hex) 0x10-0x1D 0x1E-0x1F 0x20-0x2D 0x2E-0x2F 0x30-0x39 0x3A-0x3E 0x3F Description Port 1 Control Registers, including MII PHY Registers Port 1 Status Registers, including MII PHY Registers Port 2 Control Registers, including MII PHY Registers Port 2 Status Registers, including MII PHY Registers Port 3 Control Registers Reserved Port 3 Status Register TS-1000 Media Converter Registers Register (Decimal) 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 Register (Hex) 0x40 0x41 0x42 0x43 0x44 0x45 0x46 0x47 0x48 0x49 0x4A 0x4B 0x4C 0x4D 0x4E 0x4F 0x50 0x51 0x52 0x53 0x54 0x55 0x56 0x57 0x58 0x59 0x5A 0x5B 0x5C 0x5D Description PHY Address Center Side Status Center Side Command PHY-SW Initialize Loop Back Setup1 Loop Back Setup2 Loop Back Result Counter for CRC Error Loop Back Result Counter for Timeout Loop Back Result Counter for Good Packet Additional Status Remote Command1 Remote Command2 Remote Command3 Valid MC Packet Transmitted Counter Valid MC Packet Received Counter Shadow of Register 0x58h My Status 1 My Status 2 My Vendor Info (1) My Vendor Info (2) My Vendor Info (3) My Model Info (1) My Model Info (2) My Model Info (3) LNK Partner Status (1) LNK Partner Status (2) LNK Partner Vendor Info (1) LNK Partner Vendor Info (2) LNK Partner Vendor Info (3) LNK Partner Model Info (1) October 2007 59 M9999-101607-1.3 Micrel, Inc. Register (Decimal) 94 95 Register (Hex) 0x5E 0x5F Description LNK Partner Model Info (2) LNK Partner Model Info (3) KSZ8893FQL Advanced Control Registers Register (Decimal) 96-111 112-117 118-120 121-122 123-131 132 133 134-137 138 139 140-141 Register (Hex) 0x60-0x6F 0x70-0x75 0x76-0x78 0x79-0x7A 0x7B-0x83 0x84 0x85 0x86-0x89 0x8A 0x8B 0x8C-0x8D Description TOS Priority Control Registers Switch Engine’s MAC Address Registers User Defined Registers Indirect Access Control Registers Indirect Data Registers Digital Testing Status Register Digital Testing Control Register Analog Testing Control Registers Analog Testing Status Register Analog Testing Control Register QM Debug Registers Global Registers Register 0 (0x00): Chip ID0 Bit 7-0 Name Family ID R/W RO Description Chip family Default 0x88 Register 1 (0x01): Chip ID1 / Start Switch Bit 7-4 3-1 0 Name Chip ID Revision ID Start Switch R/W RO RO RW Description Chip ID Revision ID 1 = Start the chip when external pins (PS1, PS0) = (0,1) or (1,0) or (1,1). Note: In (PS1, PS0) = (0, 0) mode, the chip will start automatically after trying to read the external EEPROM. If EEPROM does not exist, the chip will use pin strapping and default values for all internal registers. If EEPROM is present, the contents in the EEPROM will be checked. The switch will check: (1) Register 0 = 0x88, (2) Register 1 bits [7:4] = 0xA. If this check is OK, the contents in the EEPROM will override chip registers’ default values. 0 = Chip will not start when external pins (PS1, PS0) = (0,1) or (1,0) or (1,1). Default 0xA - October 2007 60 M9999-101607-1.3 Micrel, Inc. Register 2 (0x02): Global Control 0 Bit 7 Name New Back-off Enable Reserved Pass Flow Control Packet Reserved Reserved Link Change Age R/W R/W Description New back-off algorithm designed for UNH 1 = Enable 0 = Disable Reserved Do not change the default value. 1 = Switch will not filter 802.1x “flow control” packets 0 = Switch will filter 802.1x “flow control” packets Reserved Do not change the default value. Reserved Do not change the default value. Link change from “link” to “no link” will cause fast aging (