C167CS datasheet(373/517 Pages) INFINEON

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C167CS

Derivatives

The On-Chip CAN Interface

User’s Manual

19-1

V2.0, 2000-07

The On-Chip CAN Interface

Note: The C167CS incorporates two CAN modules (CAN1 and CAN2). As the structure

of the two modules is identical, this chapter mainly describes the functionality and

the operation of module CAN1. The differences between modules CAN1 and

CAN2 are described in a special section at the end of this chapter.

The Controller Area Network (CAN) bus with its associated protocol allows

communication between a number of stations which are connected to this bus with high

efficiency.

Efficiency in this context means:

• Transfer speed (Data rates of up to 1 Mbit/sec can be achieved)

• Data integrity (The CAN protocol provides several means for error checking)

• Host processor unloading (The controller here handles most of the tasks autonomously)

• Flexible and powerful message passing (The extended CAN protocol is supported)

The integrated CAN module handles the completely autonomous transmission and

reception of CAN frames in accordance with the CAN specification V2.0 part B (active),

i.e. the on-chip CAN module can receive and transmit:

• Standard frames with 11-bit identifiers, as well as

• Extended frames with 29-bit identifiers.

Note: The CAN module is an XBUS peripheral and therefore requires bit XPEN in

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