XC2230L datasheet(53/112 Pages) INFINEON

53 / 112 page

XC2230L, XC2234L

XC2000 Family / Econo Line

Functional Description

Data Sheet

V1.3, 2015-02

3.13

MultiCAN Module

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

functionality which are able to exchange Data and Remote Frames using 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.

The two CAN nodes share a common set of message objects. Each message object can

be individually allocated to either 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 set up 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 11

Block Diagram of MultiCAN Module

mc_multican_block.vsd

MultiCAN Module Kernel

Interrupt

Control

fCAN

Port

Control

CAN Control

Message

Object

Buffer

CAN

Node 0

Linked

List

Control

Clock

Control

Address

Decoder

CAN

Node n

TXDCn

RXDCn

TXDC0

RXDC0

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