XC2000 datasheet(56/647 Pages) INFINEON

56 / 647 page

XC2000 Derivatives

System Units (Vol. 1 of 2)

Architectural Overview

Preliminary

User’s Manual

2-28

V1.0, 2007-06

ArchitectureX2K, V1.0

MultiCAN Module

The MultiCAN module contains five independently operating CAN nodes with Full-CAN

functionality which are able to exchange Data and Remote Frames via a gateway

function. Transmission and reception of CAN frames is handled in accordance with CAN

specification V2.0 B (active). Each CAN node can receive and transmit standard frames

with 11-bit identifiers as well as extended frames with 29-bit identifiers.

Note: The number of available CAN nodes depends on the selected device type.

All CAN nodes share a common set of 128 message objects. Each message object can

be individually allocated to one of the CAN nodes. Besides serving as a storage

container for incoming and outgoing frames, message objects can be combined to build

gateways between the CAN nodes or to setup a FIFO buffer.

The message objects are organized in double-chained linked lists, where each CAN

node has its own list of message objects. A CAN node stores frames only into message

objects that are allocated to its own message object list, and it transmits only messages

belonging to this message object list. A powerful, command-driven list controller

performs all message object list operations.

Figure 2-4

Block Diagram of MultiCAN Module

mc_mcan_block5.vsd

MultiCAN Module Kernel

Interrupt

Control

CAN

Port

Control

CAN

Node 1

CAN Control

Message

Object

Buffer

128

Objects

CAN

Node 0

Linked

List

Control

Clock

Control

Address

Decoder

CAN

Node 4

TXDC4

RXDC4

TXDC1

RXDC1

TXDC0

RXDC0

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