TMC2005

TMC2005-JT ARCNET 5 Port HUB Controller FEATURES ARCNET HUB Circuit for ARCNET Protocol (Data Rate From 156.25Kbps to 10Mbps) Able to Connect Various Transceivers Directly Device Includes TX/RX Timing Circuit for 5 Port Hub and Direction Control Circuit, Jitter Correct Circuit and Noise Cancel Circuit Easy to Design 8 or 12 Port Hub Can Connect with HYC9088 in Normal Mode Can Connect with RS485 Transceiver, HYC5000/4000/2000, Opt Module and TTL Interface in Backplane Mode Supports both Normal and Backplane Mode at the Same Time for Media Conversion + 5V Single Power GENERAL DESCRIPTION When configuring a network, the maximum number of nodes and the maximum cable length are limited by the electric capacity of the transceiver. In this case, the network is expanded by an equipment called a “HUB” or “repeater”. It maybe necessary to have a converter between coax, T/P and the fiber cable. It is easy to design a HUB or a repeater because the TMC2005 has various features for expanding such network. It can connect with HYC9088, RS485 transceiver, HYC5000/4000/2000 and TTL interface for optical module. It can connect with three different transceivers at the same time and convert the media of each. (The data rate cannot be converted. It is necessary to operate all nodes in the same network at the same data rate). The Hubs can be expanded by connecting two or more TMC2005 chips. By setting one of 5 ports to open-drain output, the Hub can be expanded to either 12 or 16 ports. ORDERING INFORMATION Order Number(s): TMC2005-JT for 64 pin TQFP package (green, lead-free) SMSC TMC2005-JT Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet 80 Arkay Drive Hauppauge, NY 11788 (631) 435-6000 FAX (631) 273-3123 Copyright © 2006 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders. 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Revision 1.0 (01-30-06) Page 2 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet TABLE OF CONTENTS FEATURES..................................................................................................................................................................1 GENERAL DESCRIPTION.......................................................................................................................................1 PIN CONFIGURATION ............................................................................................................................................4 BLOCK DIAGRAM....................................................................................................................................................4 BLOCK DIAGRAM....................................................................................................................................................5 DESCRIPTION OF PIN FUNCTIONS ....................................................................................................................5 DESCRIPTION OF PIN FUNCTIONS ....................................................................................................................6 TX/RX INTERFACE ....................................................................................................................................................7 OPERATING MODE SETUP ..........................................................................................................................................8 PLL ...........................................................................................................................................................................8 OTHER SIGNALS ........................................................................................................................................................9 OPERATIONAL DESCRIPTION...........................................................................................................................10 DIRECTION DETERMINATION ...................................................................................................................................10 DIRECTION RELEASE ...............................................................................................................................................10 JITTER FILTER ..........................................................................................................................................................10 OPTION FEATURE FOR JITTER FILTERING .................................................................................................................11 OPTION FEATURE FOR NOISE CUT MODE .................................................................................................................11 APPLICATION NOTES ........................................................................................................................................12 PORT GROUP...........................................................................................................................................................20 VARIOUS SETUP.......................................................................................................................................................20 EXAMPLE FOR OPERATION MODE SETUP TO EACH PORT........................................................................................20 NOTE FOR UNUSED PORT .........................................................................................................................................20 EXAMPLE FOR POWER-ON RESET CIRCUIT ..............................................................................................................20 CONNECTING THE TMC2005 WITH INTERNAL PLL...................................................................................21 METHOD TO CONNECT A CRYSTAL CLOCK .............................................................................................................22 NPLLTST PIN ..........................................................................................................................................................22 CASCADING CONNECTION ................................................................................................................................23 RING NETWORK WITH THE TMC2005.....................................................................................................................26 MAXIMUM GUARANTEED RATINGS*............................................................................................................27 STANDARD OPERATING CONDITION ............................................................................................................27 DC CHARACTERISTIC - INPUT PIN ..................................................................................................................27 DC CHARACTERISTIC - OUTPUT PIN ..............................................................................................................28 AC CHARACTERISTIC - CLOCK AND RESET...................................................................................................28 AC CHARACTERISTIC – RX WAVEFORMS AND TX WAVEFORMS ........................................................................29 TMC2005-JT 64 PIN TQFP PACKAGE OUTLINE .............................................................................................31 SMSC TMC2005-JT Page 3 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet PIN CONFIGURATION TXENB1 HM SE NC LE EXTRX ME VSS1 EXTTX VDD1 CKO VSS2 CKM2 CKM1 CKM0 NC MB RXINB1 LB TXENB0 SB RXINB0 VSS8 NC VDD6 TXENA1 MA RXINA1 LA TXENA0 SA RXINA0 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 TMC2005-JT VSS7 nPULSE1 nPULSE2 nP1BAK VDD5 nCKOEN nRST VSS6 nBJA nBJB nBJE nMBA nMBB nMBE nEXTOD NC Revision 1.0 (01-30-06) RXFLT nPLLTST VDD2 XTLI XTLO VSS4 NC VDD4 VDD3 AVDD R0 LP AGS AVSS VSS3 VSS5 Page 4 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet BLOCK DIAGRAM nB JB SE SB SA nB JE nM B E nM B A nM B B MB ME MA LE LB LA nEX TO D nB JA RXI A0 N RXI A1 N NOT Circuit OR Circuit NOT Circuit TXEN A 0 TXEN A 1 RXI B0 N RXI B1 N NOT Circuit Direction Control Circuit OR Circuit NOT Circuit TXEN B 0 TXEN B 1 EX TR X NOT Circuit OR Circuit NOT Circuit HM R X FLT Output Control Circuit EX TTX Rx Buffer Tx Pulse Gen. nP 1B A K nP U LSE1 nPU LS E2 DPLL V S S1-8 V D D 1-6 XTLO XTLI AVDD A V SS nR S T Clock Multiplier PLL AND Circuit C KO C KM 0 C KM 2 A VSS LP RO nC KO EN C K M 1 nPLLTST SMSC TMC2005-JT Page 5 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet DESCRIPTION OF PIN FUNCTIONS PIN NO. 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 39 40 41 42 43 NAME TXENB1 HM SE NC LE EXTRX ME VSS1 EXTTX VDD1 CKO VSS2 CKM2 CKM1 CKM0 NC RXFLT nPLLTST VDD2 XTLI XTLO VSS4 NC VDD4 VDD3 AVDD RO LP AGS AVSS VSS3 VSS5 NC nEXTOD nMBE nMBB nMBA nBJE nBJB nBJA VSS6 nRST nCKOEN INPUT/OUTPUT OUTPUT INPUT INPUT INPUT INPUT INPUT OUTPUT OUTPUT INPUT INPUT INPUT INPUT INPUT INPUT OUTPUT DESCRIPTION Port B-1 Tx output to media transceiver Setting for traffic release time (It should be open for normal operation.) Port EXT. Polar assignment for EXTRX input (0:active Hi, 1:active Low) Reserved. It should be open. Port EXT. Polar assignment of EXTTX output (0:active Low, 1:active Hi) Port EXT. RX-Data input from media transceiver. Port EXT. Output mode assignment of EXTTX (0:pulse output, 1:Tx control output) Ground Port EXT. Output to media transceiver. Power Supply Clock Output Ground Network speed (data rate) setting. NOTE Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up OUTPUT OUTPUT INPUT INPUT INPUT INPUT INPUT INPUT INPUT INPUT INPUT INPUT Reserved. It should be open. Test Pin. It should be open. Test Pin for PLL.. It should connected to VDD (Set to high) Power Supply X'tal input/External clock input. X'tal output Ground Reserved. It should be open. Power Supply Power Supply Analog Power Supply VCO output for internal PLL. Connection pin to loop filter for internal PLL. Analog sense pin for internal PLL. Analog Ground Ground Ground Reserved. It should be open. Port EXT. Open-drain mode (0:opendrain output, 1:normal output) Port EXT. Noise cut (0:on, 1:off) Port A0/A1 Noise cut (0:on, 1:off) Port B0/B1 Noise cut (0:on, 1:off) Port EXT. Jitters correct mode (0:big jitters mode, 1:normal mode) Port A0/A1 Jitters correct mode (0:big jitter mode, 1:normal mode) Port B0/B1 Jitter correct mode (0:big jitter mode, 1:normal mode) Ground Internal reset signal (active Low) Enable of CKO output. Page 6 Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up SMSC TMC2005-JT Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet PIN NO. 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 Note: NAME VDD5 nP1BAK nPULSE2 nPULSE1 VSS7 RXINA0 SA TXENA0 LA RXINA1 MA TXENA1 VDD6 NC VSS8 RXINB0 SB TXENB0 LB RXINB1 MB INPUT/OUTPUT OUTPUT OUTPUT OUTPUT INPUT INPUT OUTPUT INPUT INPUT INPUT OUTPUT INPUT INPUT OUTPUT INPUT INPUT INPUT DESCRIPTION Power Supply. nPULSE1 output (for backplane mode). nPULSE2 output (for normal mode). nPULSE1 output (for normal mode) Ground Port A-0 Rx-data input from media transceiver. Port A. Polar assignment for RXINA0/A1 output (0:active Hi, 1:active Low) Port A-0 Tx output to media transceiver. Port A. Polar assignment for TXENA0/A1 output (0:active Low, 1:active Hi) Port A-1 Rx-data input from media transceiver. Port A. Mode assignment for TXENA0/A1 (0:pulse output, 1:Tx control output) Port A-1 Tx output to media transceiver. Power Supply Reserved. It should be open. Ground Port B-0 Rx-data input from media transceiver. Port B. Polar assignment for RXINA0/A1 input (0:active Hi, 1:Active Low) Port B-0 Tx output to media transceiver. Port B. Polar assignment for TXENA0/A1 output (0:active Low, 1:active Hi) Port B-1 Rx-data input from media transceiver. Port B. Mode assignment for TXENA0/A1 (0:pulse output, 1:TX control output) NOTE Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up Pull-up: Input with a pull-up resistor 70KΩ ± 30% TX/RX Interface FEATURE RX Port RX Port Polar Assignment TX Control NAME RXINA [0:1] RXINB [0:1] EXTRX SA, SB, SE INPUT/OUTPUT INPUT INPUT DESCRIPTION Setup the polarity by SA, SB, SE. Setup the polarity of RXINA [0:1], RXINB [0:1], EXTTX. 0 : active H 1: active L TX data pulse (Mx=0) or TX enable signal (Mx=1). Setup TX mode by MA, MB, ME. Setup the polarity by LA, LB, LE TX pulse data into HYC9068SSK/9088S-SK when ARCNET chip is at normal mode. The pulse is always active Low. TX pulse data into RS485 driver or HYC2485S/2488S when ARCNET chip is at backplane Revision 1.0 (01-30-06) TX Port TXENA [0:1] TXENB [0:1] EXTTX nPULSE [1:2] OUTPUT TX Port TX Data Output OUTPUT TX Port nP1BAK OUTPUT SMSC TMC2005-JT Page 7 DATASHEET ARCNET 5 Port HUB Controller Datasheet FEATURE NAME INPUT/OUTPUT TX Port Polarity Setup Mode Setup LA, LB, LE INPUT TX Port MA, MB, ME INPUT DESCRIPTION mode. The pulse is always active Low. Setup the polarity of TXENA [0:1], TXENB [0:1], EXTTX. 0 : active L 1: active H Setup the mode of TXENA [0:1], TXENB [0:1], EXTTX. 0: Output TX pulse. (It is equivalent to nTXEN “OR” nP1BAK) 1: Output TX enable Operating Mode Setup FEATURE Data rate setup NAME CKM [0:2] INPUT/ OUTPUT INPUT DESCRIPTION Terminal to setup the data rate of TMC2005. CKM2 CKM1 CKM0 DIVISOR MULTIPLIER SPEED 0 0 0 16 x1 156.25 Kbps 0 0 1 8 x1 312.5 Kbps 0 1 0 4 x1 625 Kbps 0 1 1 2 x1 1.25 Mbps 1 0 0 1 x1 2.5 Mbps 1 0 1 1 x2 5 Mbps 1 1 0 Reserved Reserved Reserved 1 1 1 1 x4 10 Mbps External clock is 20MHz. Refer to “VARIOUS SETUP” Noise cut mode Big jitter mode nMBA nMBB nMBE nBJA nBJB nBJE nEXTOD INPUT 0: Cut off noise from received data 1: Don’t cut off noise Setup “0” normally. Setup a jitter filter feature. Select a pulse as reference phase used by DPLL. 0: 2nd pulse (big jitter mode) 1: 1st pulse (normal mode) Setup a the use of EXTTX port. 0: Set EXTTX as open drain output and use as Ext. 1: Set EXTTX as normal output and use as 5th port. INPUT Open drain mode INPUT PLL FEATURE NAME LP INPUT/ OUTPUT OUTPUT DESCRIPTION Using PLL: Connect to an external condenser “C1” for loop filter. Using no PLL: must be open. VCO output Using PLL: Connect to an external resistor “R0” for loop filter. Using no PLL: must be open. Analog sense input. Using PLL: Connect to loop filter. Using no PLL: Connect to ground. RO OUTPUT AGS INPUT Revision 1.0 (01-30-06) Page 8 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet FEATURE NAME nPLLTST AVDD INPUT/ OUTPUT INPUT DESCRIPTION Test pin for PLL. Must always connect to VDD. Analog power supply Using PLL: Analog power supply. There are some limits on PCB pattern. Using no PLL: Power supply (+5V) same as VDD1~6. Analog ground Using PLL: Analog ground. There are some limits on PCB pattern. Using no PLL: Use a ground same as VSS1~8. AVSS Other Signals INPUT/ OUTPUT INPUT FEATURES CRYSTAL INTERFACE CRYSTAL INTERFACE SYSTEM RESET INTERFACE TEST PIN TEST PIN NAME XTLI DESCRIPTION Connect a 20MHz crystal. When supplying an external clock, input the clock to this pin. Connect a 20MHz crystal. When supplying an external clock, it must be open. Reset for initializing TMC2005. (active Low) Output internal clock of TMC2005. Output control of CKO. 0: Output internal clock on CKO. 1: Always output Low level on CKO. Set “1” Normally. It must be open It must be open Power supply (+5V) Ground XTLO nRST CKO nCKOEN OUTPUT INPUT OUTPUT INPUT TEST PIN TEST PIN POWER SUPPLY GROUND RXFLT NC [1:2] VDD [1:6] VSS [1:8] INPUT SMSC TMC2005-JT Page 9 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet OPERATIONAL DESCRIPTION Direction Determination All TX ports are set to disable mode in the initial state. When a signal is received from any RX ports, the circuit holds the port on receiving mode (disable TX) and changes the other ports to sending mode (disable RX). One port stays in RX and the rest change into TX after all. The circuit initializes the internal DPLL on the timing of received RX pulse, and the RX buffer circuit stores the RX data and filters its jitter. TX controlling circuit regenerates the stored RX pulse on nPULSE1, nPULSE2 and nP1BAK. The nPULSE1 and nPULSE2 are pulse output pins for transceivers (HYC9088A) of ARCNET normal mode. The nP1BAK is a pulse output pin for transceiver (HYC5000/4000/2000 and RS485 driver) of ARCNET back plane mode. When using optical transceiver, instead of these signals, TXENA [0:1], TXENB [0:1], EXTTX (MA, MB, ME = 0) must be used as TX data inputs of the optical transceiver. Direction Release On ARCNET protocol, each TX message starts with 6-bits of “1” ALERT and each data byte is lead by three bits (1, 1, 0) preamble. To control the HUBs direction, the circuit monitors this bit pattern and holds the state. If the end of the bit pattern comes, all TX ports return receiving mode (disable TX) again. The interval timer detects the end of the bit pattern. During data is on line, silent period is less than 4 uS* because at least one bit “1” among 10-bits is received while receiving the data. The minimum silent interval from the end of received data to the alert of the next data (the minimum time of changing the direction) is the chip turn around time (12.6 uS*) of ARCNET controller. The interval timer to detect the data end is set to 5.6uS by adding some margin to the above interval for neglecting the reflection on a cable. [Note] Numbers marked * are at 2.5Mbps operation. Jitter Filter To build a network with transceivers that introduce big jitter like ones for optical fiber, the old HUB that has direction control only may cause a transmission error because jitters on each HUB are added when several HUBs were connected in serial. The TMC2005 fixes that problem with jitter filtering and wave shaping through the following three steps. 1) Input Sampling The TMC2005 samples a data on a network by eight times clock of the network data. 2) Jitter Filtering (DPLL) The TMC2005 filters the jitter (± 100nS at 2.5Mbps) of network data sampled by 8X clock through the internal digital PLL and stores the data into the buffer. 3) Wave Shaping Output The TMC2005 re-synchronizes and regenerates the network data at the same clock as the data rate. The capability of the jitter filtering is shown below. DATA RATE 10Mbps 5Mbps 2.5Mbps 1.25Mbps 625Kbps 312.5Kbps 156.25Kbps CAPABILITY OF JITTER FILTERING ± 25nS ± 50nS ± 100nS ± 200nS ± 400nS ± 800nS ± 1.6uS Revision 1.0 (01-30-06) Page 10 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet Option Feature for Jitter Filtering When any RX ports receive the bigger jitter than its allowance, the TMC2005 may fail to receive the data correctly and the network may be down.. However the below method to escape is effective for the case that a momentary big jitter occurs under a special condition like an optical transceiver. 1) Big jitter (BJ) mode The reference phase of the internal DPLL is changed from the first pulse to the second pulse by setting “0” to the big jitter mode pins (nBJX). This setup is effective for the case that a big jitter occurs when rising up from DC state as same as when using an optical transceiver with ATC function (refer to complement). Note: The delay time of the TMC2005 becomes 400nS (at 2.5Mbps) longer than the normal mode. The delay time limits the maximum cable length and maximum node number. [Complement] The big jitter may occur in the case of using an optical transceiver, especially an optical receiver that has an ATC circuit that controls threshold level in proportion to received light strength. The first pulse especially after long time idle has the big jitter but the second pulse is stabilized. 2) Changing polar of RX port In order to filter the jitter of edge in one side, it is effective to set reverse to pin SA, SB, SE to change the polarity of RX port. Note: Changing the polarity of RX port makes the delay time of the TMC2005 circuit a half bit (200nS) longer than original 2.5Mbps, and the delay time affects the maximum cable length and maximum node number. Option Feature for Noise Cut mode The Noise cut mode is enabled by setting pin nMBx sets 0. The noise cut mode is a function to remove the ringing noise and the reflection noise generated on the leading edge side of the input pulse to receive data input RXINx. The position and the width of the “dead band” are shown in the figure below. - Dead band at Normal mode (nMBx=1) Period of data rate (Tdr) Tdr/8 = 1 clock - Dead band at Noise cut mode (nMBx=0) Period of data rate (Tdr) Tdr/8 = 1 clock RXIN (Active High) Ideal waveform dead band RXIN (Active High) Ideal waveform dead band: Noise cut band RXIN edge reference position: Generated by adjacent phase of SYNC character (1,1,0) RXIN edge reference position: Generated by adjacent phase of SYNC character (1,1,0) SMSC TMC2005-JT Page 11 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet APPLICATION NOTES Example 1: A five ports HUB with HYC4000s in backplane mode. FIGURE 1 - APPLICATION EXAMPLE Only the TMC2005 and five transceivers are indicated in the above figure. Connect the other pins adequately. Revision 1.0 (01-30-06) Page 12 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet Example 2: A five ports HUB with HYC9088s and a optical transceiver(TODX270A) links the two physical layers; dipulse and fiber optics. FIGURE 2 - APPLICATION EXAMPLE 2 Only the TMC2005 and five transceivers are indicated in the above figure. Connect the other pins adequately. SMSC TMC2005-JT Page 13 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet Example 3: A five ports HUB with two optical transceivers, two HYC9088s, and a HYC4000 links three physical layers; fiber optics, dipulse, and AC-485. FIGURE 3 - APPLICATION EXAMPLE 3 Only the TMC2005 and five transceivers are indicated in the figure above. Connect the other pins properly. Revision 1.0 (01-30-06) Page 14 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet Example 4: An on-board type HUB with a COM20020 and four optical transceivers in backplane mode. FIGURE 4 - APPLICATION EXAMPLE 4 Only the TMC2005 and four transceivers with the COM20020 are indicated in the above figure. Connect the other pins adequately. SMSC TMC2005-JT Page 15 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet Example 5: An on-board type HUB with a COM20020 and four RS485 transceivers. FIGURE 5 - APPLICATION EXAMPLE 5 Only the TMC2005 and four transceivers with the COM20020 are indicated in the above figure. Connect the other pins adequately. Revision 1.0 (01-30-06) Page 16 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet Example 6: An on-board type HUB with a COM20020, two HYC4000s, and two HYC9088s links two different physical layers; dipulse and AC-485. FIGURE 6 - APPLICATION EXAMPLE 6 Only the TMC2005 and four transceivers with the COM20020 are indicated in the above figure. Connect the other pins adequately. SMSC TMC2005-JT Page 17 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet Example 7: An eight ports HUB are composed by using two TMC2005. Two TMC2005 connects the EXTTX signal with the EXTRX signal. FIGURE 7 - APPLICATION EXAMPLE 7 Only the two TMC2005s are indicated in the above figure. Connect the other pins adequately. Revision 1.0 (01-30-06) Page 18 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet Example 8: A sixteen ports HUB are composed by using four TMC2005. The EXT port between TMC2005 is made an open-drain mode and it connects it (left example). Or put standard logic IC such as 74LS22 outside (right example). This connected method is excellent in noised respect compared with connected method of open-drain mode. Data rate: 5Mbps and below Data rate: 10Mbps and below or FIGURE 8 - APPLICATION EXAMPLE 8 Only the four TMC2005s are indicated in the above figure. Connect the other pins adequately. Note: Use the wiring pattern length that connects between four TMC2005s by five inches or less in open-drain mode. Four TMC2005s is maximum in open-drain mode. SMSC TMC2005-JT Page 19 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet PORT GROUP The five ports can be divided into three groups (group A: two ports, group B: two ports, extension port: one port) and each group can select TX/RX polar, noise cut mode, and big jitter mode respectively. Select pins for each group are as follows: FUNCTION RECEIVE TRANSMIT RX POLARITY TX POLARITY TX CONTROL NOISE CUT BIG JITTER EXTENSION Various Setup Example For Operation Mode Setup To Each Port LA, LB, LE MA, MB, ME RX POLAR TX POLAR TRANSCEIVER 0 1 Active Low Active Low HYC2485S/HYC2488S 1 0 Active High Active High Optical Transceiver 0 1 Active High Active Low HYC9088/HYC9068 1 1 Active Low Active High RS485 Transceiver GROUP A RXINA0, 1 TXENA0, 1 SA LA MA nMBA nBJA GROUP B RXINB0, 1 TXENB0, 1 SB LB MB nMBB nBJB EXTENSION EXTRX EXTTX SE LE ME nMBE nBJE nEXTOD SA, SB, SE 1 0 0 1 Note for Unused port Unused ports can be left open because RX port (RX input), RX polar (S input), TX polar (L input), TX control (M input) pins have internal pull-up resistors. Because of internal pull-up resistors, select pins for noise cut (nMB input), big jitter (nBJ input) can be left open when used for setting “OFF”. Example for Power-On Reset Circuit FIGURE 9 - POWER-ON RESET Revision 1.0 (01-30-06) Page 20 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet CONNECTING THE TMC2005 WITH INTERNAL PLL When using the TMC2005 at data rate 2.5Mbps or lower, it is not necessary to use internal PLL. Leave the loop filter pins (RO, LP) open and connect AGS to the Ground. The pins for the analog power supply (AVSS, AVDD) may connect to digital power supply. When using the TMC2005 at data rate 5Mbps or higher, the internal PLL has to be used as a clock multiplier. PCB layout must follow the guidelines at Figure 10, refer to Notes 1 through 5. FIGURE 10 - PLL PATTERN LAYOUT Note 1: Prohibit the patterns for LP and RO from occupying the area of digital power supply. Use the area of analog power supply between VAA and AVSS. Note 2: Encircle the pattern between LP, RO and AGS with wide pattern of analog ground. Note 3: Connect the analog power supply “VAA” with 0.1 uF condenser (a) with in 1/8 inch (~ 3.2mm) from VAA pin. Note 4: In order to filter the jitter of low frequency, connect a 10 uF condenser (b) in parallel with the condenser (a). Note 5: Place 0.1 uF bypass condenser (c) within ¼ inch (~ 6.4mm) from VDD3 and VSS3. Connect the ground side of a condenser (c) at the place (*) where AVSS returns to GND plane. SMSC TMC2005-JT Page 21 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet Method To Connect A Crystal Clock Connect with external parts as follows: FIGURE 11 - CONNECTING THE CRYSTAL CLOCK Note 1: When designing a printed circuit board, keep the patterns as short as possible and don’t cross with other patterns. Note 2: When using an external clock like an oscillator module, connect it to XTLI pin and leave XTLO pin open. When designing a printed circuit board, wire between XTLI pin and oscillator should be short as possible. nPLLTST pin nPLLTST must be connect toVDD. The rest of input pins have pull-up resistors built in, but nPLLTST pin does not have the pull-up resistor. Clock signal cannot ditributed into the TMC2005 if nPLLTST pin is connected GND or is left open. Revision 1.0 (01-30-06) Page 22 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet CASCADING CONNECTION HUBs can be connected in cascade by using the ports as Fig. 12. In the case of cascade connection, it is necessary to consider how many HUBs can exist in serial. The maximum delay between input port and output port is 650ns @2.5Mbps at the TMC2005. It is equivalent to the propagation delay when a cable length is 135m. For example, if every cable length is 10m in Figure 12, the longest distance is physically 50m but it is electrically 590m because of multiplying 10m by 5 and 135m by 4, and the total propagation delay becomes 2.8uS. For analyzing the network timing, consider the delay caused by HUBs. In the ARCNET protocol, it is defined that the longest distance between nodes is the maximum 6.4Km. For example, if 20 TMC2005s exist between nodes in the longest distance, the actual cable length is 3.7Km because of deducting 135m by 20 in converting to cable length from 6.4Km. TMC2005 TMC2005 TMC2005 TMC2005 Port 1 Port 2 Port 3 Port 4 Port 5 Port 1 Port 2 Port 3 Port 4 Port 5 Port 1 Port 2 Port 3 Port 4 Port 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 NODE FIGURE 12 - CASCADE CONNECTION OF 4 HUBS Two examples of eight ports HUBs using two TMC2005s are shown in Fig. 13 and 14. If connecting as in Fig. 13, eight TMC2005s exist between the nodes at both far ends. On the other hand, when assigning two ports for cascading connection to the same TMC2005, the number of TMC2005 in serial connection can be down to the number of HUBs plus two, which can reduce the propagation delay. SMSC TMC2005-JT Page 23 DATASHEET 1 2 3 4 5 NODE Port 1 Port 2 Port 3 Port 4 Port 5 Revision 1.0 (01-30-06) ARCNET 5 Port HUB Controller Datasheet HUB 1 TMC2005 TMC2005 TMC2005 HUB2 TMC2005 TMC2005 HUB 3 TMC2005 TMC2005 HUB4 TMC2005 1 2 3 4 2 3 4 5 1 2 3 4 2 3 4 5 1 2 3 4 2 3 4 5 1 2 3 4 1 2 3 4 2 3 4 5 1 2 3 4 2 3 4 5 1 2 3 4 2 3 4 5 1 2 3 4 NODE FIGURE 13 - CASCADE CONNECTION OF 8 PORT HUB HUB 1 TMC2005 TMC2005 TMC2005 HUB2 TMC2005 HUB 3 TMC2005 TMC2005 TMC2005 HUB4 TMC2005 1 2 3 4 2 3 4 5 1 2 3 4 2 3 4 5 1 2 3 4 2 3 4 5 1 2 3 4 1 2 3 4 2 3 4 5 1 2 3 4 2 3 4 5 1 2 3 4 2 3 4 5 1 2 3 4 NODE FIGURE 14 - CASCADE CONNECTION OF 8 PORT HUB Revision 1.0 (01-30-06) Page 24 2 3 4 5 2 3 4 5 2 3 4 5 2 3 4 5 NODE NODE SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet Fig.15 shows a 16 ports HUB with four TMC2005s connected by open–drain ports. When assigning two ports for cascade connection to the same TMC2005, the number of TMC2005s for serial connection can be reduced to the number of HUBs plus two. HUB2 HUB 3 TMC2005 1 2 3 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 HUB 1 TMC2005 1 2 3 4 1 2 3 4 HUB 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 TMC2005 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 NODE 1 2 3 4 NODE FIGURE 15 - CASCADE CONNECTION OF 16 PORT HUB Note: When connecting TMC2005 by open-drain output on a board, connecting TMC2005s must be four or less, and the data rate must be 5Mbps or slower. The pattern of open-drain output has to be as short as possible (less than 15cm). SMSC TMC2005-JT Page 25 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet Ring Network With the TMC2005 The reliability of the network can be improved by connecting every node in a ring, because the communication is maintained through the reverse route even if the cable is cut at a point. However ARCNET controller alone can not support ring, because ARCNET is a half-duplex communication system. Using HUBs makes possible for ARCNET to built a ring network as in Fig.16. This configuration is available only for using fiber optics. (Refer to the application note for details.) Optical Transceiver COM20020 TMC2005 A B Optical Fiber COM20020 TMC2005 TMC2005 COM20020 nRST TXEN nRESET CK TMC2005 TXEN of any port COM20020 CT FIGURE 16 - RING CONFIGURATION Note 1: Noise may cause an endless loop in a ring system, and the network may hang up. Therefore take care of designing the patterns between TMC2005 and transceiver or cabling of system. Example for system hang-up A noise occurs only at “A” point in Figure 16. The noise propagates clockwise on the network. TMC2005 detects the noise that came back through the ring. The noise causes an endless loop in the ring. Example for no hang-up Any noise occurs at “A” and “B” points in Figure 16 at the same time. The noise propagates to both directions in the network. An endless loop doesn’t occur because TMC2005s in the middle absorb the noise from both sides. Note 2: Place a watch dog timer on one of the TMC2005 in at least one ring. To protect from hang-up the detecting time of the watch dog timer should be set to longer than 2.7 mS (@ 2.5Mbps) that is the burst time in the ARCNET protocol. Note 3: Consider that a total of each segment delay time (cable delay, TMC2005 delay, driver delay and receiver delay) between HUBs in a network is less than 5.6uS (@ 2.5Mbps). The maxmimum distance between HUBs is approximiately 1000m (@ 2.5Mbps). Revision 1.0 (01-30-06) Page 26 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet OPERATIONAL DESCRIPTION MAXIMUM GUARANTEED RATINGS* Stresses above those listed may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other condition above those indicated in the operational sections of this specification is not implied. (Note) When powering this device from laboratory or system power supplies, it is important that the Absolute Maximum Ratings not be exceeded or device failure can result. Some power supplies exhibit voltage spikes or “glitches” on their output when the AC power is switch on or off. In addition, voltage transients on the AC power line may appear on the DC output. If this possibility exists it is suggested that a clamp circuit be used. Vss = 0V ITEM POWER SUPPLY VOLTAGE INPUT VOLTAGE OUTPUT VOLTAGE AMBIENT TEMPERATURE STANDARD OPERATING CONDITION Vss = 0V ITEM POWER SUPPLY VOLTAGE AMBIENT TEMPERATURE DC CHARACTERISTIC - INPUT PIN SYMBOL ITEM VIH VIL IIH IIL IIL IOZ IDD High Level Input Voltage Low Level Input Voltage High Level Input Current Low Level Input Current With pull-up Output Leak Current Dissipation Current SYMBOL VDD VIN VOUT Tstg RATING -0.3 +7.0 -0.3 VDD +0.3 -0.3 VDD +0.3 -40 +125 UNIT V V V °C SYMBOL VDD Ta RATING 4.5 – 5.5 0 - +85 UNIT V °C CONDITION XTLI, nPLLTST Others VIN=VDD VIN=VSS Vin=VSS VOUT=VDD or VSS Operating MIN 3.5 2.2 -10 -10 -200 -10 MAX 0.8 10 10 -10 10 100 UNIT V V V uA uA uA uA mA SMSC TMC2005-JT Page 27 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet DC CHARACTERISTIC - OUTPUT PIN SYMBOL ITEM VOH High Level Output Voltage VOH VOL VOL High Level Output Voltage Low Level Output Voltage Low Level Output Voltage CONDITION IOH=-4mA IOH=-8mA IOL=4mA IOL=8mA MIN 2.4 2.4 MAX UNIT V V V V 0.4 0.4 PIN 1,9,46,51, 55,61 11,45,47 1,9,46,51, 55,61 11,45,47 AC CHARACTERISTIC - CLOCK and RESET ITEM SYMBOL Generating Static Time tx Clock Cycle tCYC Clock Frequency Deflection tCDF Clock Pulse Width tCW Reset Pulse Width ttRSW Note 1: Use only F=20MHz Note 2: VDD=4.5V MIN TYP 50 MAX 4 100 -100 20 200 UNIT mS nS ppm nS nS CONDITION Note 1 Note 1 Note 1 Note 1 XTLI t CW t CW tCYC nRST t RSW FIGURE 17 - CLOCK AND RESET Revision 1.0 (01-30-06) Page 28 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet AC CHARACTERISTIC – Rx waveforms and Tx waveforms t1 RXINx (S=1) (Received port) t2 t3 t4 t5 TXENy (M=1, L=0) * 4 ports except received port t6 nP1BAK /TXENy (M=0, L=0) * 4 ports except received port t7 t8 t10 t9 t11 t12 t13 t15 nPULSE1 t14 t16 t17 nPULSE2 t19 t18 FIGURE 18 - RX WAVEFORMS AND TX WAVEFORMS ITEMS RXIN Low Pulse Width RXIN High Pulse Width RXIN Period MARK t1 t2 t3 MIN 15 15 TYP MAX UNIT nS nS REMARK Tdr (400) nS 3/8Tdr+50 (200) 112/8Tdr+50 (5,650) 10/8Tdr+50 (550) nS nS (Value at 2.5Mbps) RXIN First Active Edge to TXEN Active t4 2/8Tdr (100) nS Note1 (Value at 2.5Mbps) Note1 (Value at 2.5Mbps) Note2, Note3 (Value at 2.5Mbps) Note2 (Value at 2.5Mbps) Note2 (Value at 2.5Mbps) Note2 (Value at 2.5Mbps) Note2, Note3 (Value at 2.5Mbps) RXIN Last Active Edge to TXEN Inactive t5 111/8Tdr (5,550) RXIN First Active Edge to nP1BAK/TXEN First Active Edge t6 9/8Tdr (450) nP1BAK/TXEN Low Pulse Width t7 1/2Tdr (200) nS nP1BAK/TXEN High Pulse Width t8 1/2Tdr (200) nS nP1BAK/TXEN Period RXIN Active Edge to nP1BAK/TXEN Active Edge (Except First Edge of RXIN) t9 5/8Tdr (250) Tdr (400) nS 14/8Tdr+50 (750) t10 9/8Tdr+50 (500) nS SMSC TMC2005-JT Page 29 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet ITEMS RXIN First Active Edge to nPULSE1 First Active Edge MARK t11 MIN 9/8Tdr (450) TYP MAX 10/8Tdr+50 (550) UNIT nS REMARK Note3 (Value at 2.5Mbps) nPULSE1 Low Pulse Width t12 1/4Tdr (100) nS (Value at 2.5Mbps) nPULSE1 High Pulse Width t13 3/4Tdr (300) nS (Value at 2.5Mbps) nPULSE1 Period RXIN Active Edge to nPULSE1 Active Edge (Except First Edge of RXIN) nPULSE1 to nPULSE2 Overlap t14 5/8Tdr (250) t16 -10 Tdr (400) nS 14/8Tdr+50 (750) +10 nS (Value at 2.5Mbps) t15 9/8Tdr+50 (500) 0 1/4Tdr (100) nS Note3 (Value at 2.5Mbps) nPULSE2 Low Pulse Width t17 nS (Value at 2.5Mbps) nPULSE2 High Pulse Width t18 3/4Tdr (300) nS (Value at 2.5Mbps) nPULSE2 Period t19 Tdr (400) nS (Value at 2.5Mbps) Tdr: Period of data rate, ex) Tdr=400nS at 2.5Mbps Note1: Applied to TXENx which is set to Mx=1. (Tx Control mode) Note2: Applied to TXENx which is set to Mx=0. (Pulse output mode) Note3: Extra one “Tdr” time to be added at RXINx is set to nBJx=0. (Big Jitter mode) Revision 1.0 (01-30-06) Page 30 SMSC TMC2005-JT DATASHEET ARCNET 5 Port HUB Controller Datasheet TMC2005-JT 64 PIN TQFP PACKAGE OUTLINE D D1 Ze E1 E 64 1 Zd SYMBOL D D1 E E1 Ze Zd MIN (mm) 11.8 9.9 11.8 9.9 TYP (mm) 12.0 10.0 12.0 10.0 1.25 typ 1.25 typ MAX (mm) 12.2 10.1 12.2 10.1 SMSC TMC2005-JT Page 31 Revision 1.0 (01-30-06) DATASHEET ARCNET 5 Port HUB Controller Datasheet A2 A b bbb M e aaa A1 SYMBOL A A1 A2 B E aaa bbb MIN (mm) 0.95 1.35 0.17 TYP (mm) 0.1 1.4 0.22 0.5 BSC 0.08 0.08 MAX (mm) 1.6 0.15 1.45 0.27 c L MIN (mm) 0.9 0.45 TYP (mm) 0.145 0.6 MAX (mm) 0.2 0.75 SYMBOL c L Revision 1.0 (01-30-06) Page 32 SMSC TMC2005-JT DATASHEET