Freescale Semiconductor MCF5480 - Manual (Page 572)

MCF548x Reference Manual, Rev. 3
21-2 Freescale Semiconductor
Figure 21-2. FlexCAN Message Buffer Architecture
21.1.2 The CAN System
A typical CAN system is shown below in Figure 21-3 .
Figure 21-3. Typical CAN System
Each CAN station is connected physically to the CAN bus through a transceiver. The transceiver provides
the transmit drive, waveshaping, and receive/compare functions required for communicating on the CAN
ID
Data
Buffer 0
ID
Time Stamp
Data Length
Data
Buffer 13
ID
Time Stamp
Data Length
Data
Buffer 14
ID
Time Stamp
Data Length
Data
Buffer 15
•
•
•
•
•
•
•
•
Mask 15
Mask 14
Transparent to User
Rx Shifter
Tx Shifter
Serial Buffers
Tx
Rx
Control
Global Mask
IRQ or DMA Request
Data
•
•
•
•
•
•
16 Transmit/Receive
Message Buffers
CAN Bus
FlexCAN
CANRXn
Transceiver
CAN Station 1 CAN Station 2 CAN Station n
CANTXn
MCF548x