xc2234l-20f80l Infineon Technologies Corporation, xc2234l-20f80l Datasheet - Page 53

• Manufacturer Part Number: xc2234l-20f80l
• Description: Lim 16/32-bit Single-chip Microcontroller With 32-bit Performance Xc2000 Family / Econo Line
• Manufacturer: Infineon Technologies Corporation

PRELIMINARY
3.13
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
Data Sheet
Address
Decoder
Interrupt
Control
Control
Clock
MultiCAN Module
Block Diagram of MultiCAN Module
f
CAN
Message
Object
Buffer
MultiCAN Module Kernel
CAN Control
Control
Linked
List
49
Node n
Node 0
CAN
CAN
XC2000 Family / Econo Line
TXDCn
TXDC0
RXDCn
RXDC0
Functional Description
XC2230L, XC2234L
mc_multican_block.vsd
Control
Port
V1.0, 2010-12