XC2723X Datasheet, PDF (50/109 Pages) Infineon Technologies AG – 16/32-Bit Single-Chip Microcontroller with 32-Bit Performance

XC2723X
XC2000 Family / Econo Line
Functional Description
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.
Clock fCAN
Control
Address
Decoder
Interrupt
Control
MultiCAN Module Kernel
CAN
Node n
Message
Object
Buffer
Linked
List
Control
CAN Control
CAN
Node 0
TXDCn
RXDCn
Port
Control
TXDC0
RXDC0
Figure 11 Block Diagram of MultiCAN Module
mc_ mult ican_ block. vsd
Data Sheet
46
V1.2, 2012-07