Texas Instruments SN65HVD257, User Manual

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User's Guide
SLLU172 – August 2012
SN65HVD257 CAN EVM:
Functional Safety and Redundant CAN Network
This User Guide details the SN65HVD257 CAN EVM (Controller Area Network Evaluation Module)
transceiver operation. It comes with two SN65HVD257 CAN transceivers factory installed, set up in a
redundant (parallel) CAN bus configuration. The EVM may be reconfigured by a user for other CAN
topologies. This User’s Guide explains the EVM configurations for basic redundant CAN evaluation, and
includes various load and termination settings.
Contents
1 Introduction
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2
1.1 Overview
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2
1.2 Example Using the SN65HVD257 in a Redundant Physical Layer CAN Network Topology
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2
2 SN65HVD257 CAN EVM
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4
3 SN65HVD257 EVM Setup and Operation for Redundant (Parallel Networks)
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7
3.1 Overview and Basic Operation Settings
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7
3.2 Using CAN Bus Load and Termination Configuration
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9
3.3 Using CAN Bus Protection and Filtering Configuration
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10
3.4 Using Customer Installable IO Options for Current Limiting, Pull up or down, Noise Filtering
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11
3.5 Using customer installable IO options for 3.3V IO
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4 SN65HVD257 EVM Configuration for Two Independent Networks
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12
4.1 Transceiver 1 Header (JMP3)
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4.2 Transceiver 2 Header (JMP7)
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5 Bill of Material (BOM)
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14
List of Figures
1 SN65HVD257 Basic Block Diagram and Pin Out
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2
2 Typical SN65HVD257 Node To Build A Redundant Physical Layer Topology
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3 Typical Redundant Physical Layer Topology Using SN65HVD257
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4 SN65HVD257 CAN EVM Top
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5 CAN EVM Schematic
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6 Loopback Node 1 (JMP5 to JMP12)
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7 Loopback Node 2 (JMP10 to JMP13)
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List of Tables
1 SN65HVD257 CAN EVM Connections
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2 Main Supply and IO Header (JMP1) Connections
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3 CAN Bus Termination Configuration
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4 CAN Bus Protection and Filtering Configuration
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5 EVM Digital IO Configuration
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6 EVM Digital IO Configuration
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1 SLLU172 – August 2012 SN65HVD257 CAN EVM: Functional Safety and Redundant CAN Network
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