XC228X Datasheet, PDF (64/110 Pages) Infineon Technologies AG – 16/32-Bit Single-Chip Microcontroller with 32-Bit Performance

XC2287 / XC2286 / XC2285
XC2000 Family Derivatives
Preliminary
Functional Description
3.12
MultiCAN Module
The MultiCAN module contains up to 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.
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.
MultiCAN Module Kernel
Clock
f_CAN
Control
Address
Decoder
Message
Object
Buffer
128
Objects
Linked
List
Control
CAN
Node 4
TXDC4
RXDC4
.
.
.
.
.
.
.
.
.
CAN
Node 1
TXDC1
Port
RXDC1 ^Control
CAN
Node 0
TXDC0
RXDC0
Interrupt
Control
CAN Control
Figure 11 Block Diagram of MultiCAN Module
mc_mcan_block5.vsd
Data Sheet
62
V0.91, 2007-02
Draft Version