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TMC20073 CircLinkTM Communications Controller LSI
Data Brief
Product Features

3.3V (3.0 to 3.6V) Power Supply Voltage (Vdd) 128 Pin TQFP Package (14x14, 0.4 pitch) Supports 8/16-Bit Data Bus (Selectable) Full 1K On-Chip Dual-Port Buffer RAM Supports Sequential I/O Mapped Access to Internal RAM Buffer Supports up to 31 Nodes Low Power CMOS, 3.3V Operation with 5V Tolerance
Cabling Options
-- Fiber Optics, RS485 Twisted Pair

High Speed: Up to 5 Mbps Include 3 Port HUB Can operate with or without CPU
-- With CPU: Support interface to multiple CPU's - Intel (80XX) and Motorola (68XXX) -- Without CPU: Support general purpose I/O ports - 16 bit input and 16 bit output
Support multi-topology
-- Bus, Star and Mixed type
Temperature Range from -20 to 85
Micro-Controller bus
nMUX
nRWM W16 nSWAP
Others
Clock
nNSTCOUT
FLASHO
Memory Access Mediation Circuit Register Access Control Circuit
Mode Setting Interrupt Status Interrupt Mask EC Command Receive Mode(#01-#31) Receive Flag(#01-#31) Clock Master SID Net. Standard Time Page Register Address Register Diag. Register Data Register H Data Register L
Address pointer
Address Multiplexer
Address Pointer
Buffer Memory 512B 512B
Improved ARCNET Protocol Micro Sequencer Working Registers
Data Latch
Alarm Setting Receive SID Search SID MAX ID Setting (MAXID) Node ID Setting (NID) Page Size Setting (PS) Data Rate Setting PIN-INFO ERR-INFO TENT-ID Register CONFIG Register SETUP Registers
Data Latch
Shift Register
RECON Timer
TX Signal Generator
RX Synchronous circuit
3Port HUB Circuit
CMI Encode Reset Circuit OSC
CMI Decode CMI Synchro
MAXID
NID
PS
CKP
nSTALONE
nDIAG
nHUBON
nCMIBYP
TXEN2 TXEN TXD RXIN2 RXIN
Figure 1 Internal Block Diagram of LSI
SMSC TMC20073
PRODUCT PREVIEW
Revision 1.3 (02-11-04)
ORDERING INFORMATION
Order Number(s): TMC20073-NT for 128 pin TQFP package (Lead-Free)
80 Arkay Drive Hauppauge, NY 11788 (631) 435-6000 FAX (631) 273-3123
Copyright (c) SMSC 2004. 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. SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT; TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Revision 1.3 (02-11-04)
PRODUCT PREVIEW
2
SMSC TMC20073
General Description
The CircLink TMC20073 controller is an LSI device developed for DATA COMMUNICATION control using a modified ARCNET base token passing protocol guaranteeing message integrity and maximum delivery times which can be calculated. In an ARCNET based network when a node receives the token it becomes the temporary master of the network, this time frame is however, of short duration. The length of messages are limited and therefore, no one node can dominate the network since it must relinquish control of the token. Once a message has been sent the token is sent to the next logical node allowing it to be come the master. By using this token passing scheme for mediating access of the network by any one node, the time performance of the network becomes predictable or DETERMINISTIC. Industrial network applications require predictable performance to ensure that controlled events occur when required. The TMC20073 CircLink controller with it's token passing protocol is therefore the ideal solution for real time control systems. The TMC20073 incorporates 1 kilobyte of buffer RAM which is portioned from 4 to a maximum of 32 pages. In a network which has up to 31 nodes, the data being sent by the controlling node is also received by all other nodes of the network and stored according to node source ID. For the target node the received data is executed per the ARCNET flow control and the data is stored in it's buffer RAM. Thus the receiving node acts on the data while the remaining nodes on the network discard the data once the receiving node has executed the instruction. This redundancy assures higher reliability. Reconfiguration of a CircLink network becomes necessary when the token is destroyed. Accordingly, the maximum wait time for sending end will not be guaranteed during this moment and the feature of real-time processing is impaired. To cope with the disability of real-time feature, the ARCNET protocol is modified to avoid token missing as much as possible and reduce the network reconfiguration time in token missing. CircLink also uses CMI code for transmitting signals, rather than the dipulse or bipolar signals which are the standard ARCNET signals. Since the CMI signal eliminates the DC element, a simple combination of a standard RS485 IC and a pulse transformer can be used to implement a transformer coupled network.
SMSC TMC20073
PRODUCT PREVIEW
3
Revision 1.3 (02-11-04)
Package Outline
16.0 +/-0.2 14.0 +/-0.1
96 65
0.8TYP
97
64
14.0 +/-0.1
33 32
TMC20073
128
1
0.8TYP
0.4
0.18 +0.035 -0.035
0.105 M
1.025 +/-0.05
0.08
Figure 2 128 Pin TQFP Package Outline, 14x14, 0.4 pitch (Lead-Free)
Revision 1.3 (02-11-04)
PRODUCT PREVIEW
4
0.1 +0.05 -0.05
1.20MAX
16.0 +/-0.2
SMSC TMC20073

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