KS8993M_11

KSZ8993M/ML Integrated 3-Port 10/100 Managed Switch with PHYs Rev 1.06 General Description The KSZ8993M, a highly integrated Layer 2 managed switch, is designed for low port count, cost-sensitive 10/100 Mbps switch systems. It offers an extensive feature set that includes tag/port-based VLAN, quality of service (QoS) priority, management, management information base (MIB) counters, MII/SNI, and CPU control/data interfaces to effectively address both current and emerging Fast Ethernet applications. The KSZ8993M contains two 10/100 transceivers with patented mixed-signal low-power technology, three media access control (MAC) units, a highspeed non-blocking switch fabric, a dedicated address lookup engine, and an on-chip frame buffer memory. Both PHY units support 10BASE-T and 100BASETX. In addition, one of the PHY unit supports 100BASE-FX. The KSZ8993ML is the single supply version with all the identical rich features of the KSZ8993M. ___________________________________________________________________________________________________ Functional Diagram 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 2008 1 M9999-020606 Micrel, Inc. KSZ8993M/ML 1KLook-Up Engine AUTO MDI/MDI-X 10/100 T/TX/FX PHY 1 10/100 MAC1 Queue Manageme nt FIF O,Flow Control, VLANTagging,Priority AUTO MDI/MDI-X 10/100 T/TX PHY 2 10/100 MAC2 Buffer Manageme nt MII/SNI 10/100 MAC3 Frame Buffers SNI SPI SPI MIB Counters MIIM SMI I2C P1 LED[3:0] P2 LED[3:0] Control Registers EEP ROM Interface LED Drivers Strap-In Configuration Pins Features • Proven Integrated 3-Port 10/100 Ethernet Switch – 2nd generation switch with three MACs and two PHYs fully compliant to IEEE 802.3u standard – Non-blocking switch fabric assures fast packet delivery by utilizing a 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 – Automatic MDI/MDI-X crossover with disable and enable option – 100BASE-FX support on port 1 – MII interface supports both MAC mode and PHY mode – 7-wire serial network interface (SNI) support for legacy MAC – Comprehensive LED Indicator support for link, activity, full/half duplex and 10/100 speed • Comprehensive Configuration Register Access – Serial management interface (SMI) to all internal registers – MII management (MIIM) interface to PHY registers – SPI and I2C Interface to all internal registers – I/0 Pins strapping and EEPROM to program selective registers in unmanaged switch mode – Control registers configurable on the fly (portpriority, 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 • Advanced Switch Features – IEEE 802.1q VLAN support for up to 16 groups (full-range of VLAN ID) – 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 from 0Mbps to 100Mbps at the ingress and egress port, rate options for high and low priority per port basis – Broadcast storm protection with % control (global and per port basis) – IEEE 802.1d spanning tree protocol support – Upstream special tagging mode to inform the processor which ingress port receives the packet – IGMP v1/v2 snooping support for multicast packet filtering – Double-tagging support October 2008 2 M9999-020606 Micrel, Inc. KSZ8993M/ML • Switch Management 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: