Motorola MCF5281 사용자 설명서
25-8
MCF5282 User’s Manual
MOTOROLA
Functional Overview
Figure 25-5. FlexCAN Memory Map
25.4 Functional Overview
The FlexCAN module is flexible in that each one of its 16 message buffers (MBs) can be
assigned either as a transmit buffer or a receive buffer. Each MB, which is up to 8 bytes
long, is also assigned an interrupt flag bit that indicates successful completion of either
transmission or reception.
assigned either as a transmit buffer or a receive buffer. Each MB, which is up to 8 bytes
long, is also assigned an interrupt flag bit that indicates successful completion of either
transmission or reception.
NOTE
Note that for both processes, the first CPU action in preparing
a MB should be to deactivate it by setting its code field to the
proper value. This requirement is mandatory to assure proper
operation.
a MB should be to deactivate it by setting its code field to the
proper value. This requirement is mandatory to assure proper
operation.
ID_HIGH
ID_LOW
Control/Status
Reserved
8 bytes Data field
0x80-0x8F
0x82
0x84
0x86
0x84
0x86
Message Buffer 0
Message Buffer 1
Message Buffer 2
Message Buffer 15
0x8C
0x90
0xA0
0x170
Message Buffers
0x8E
0x17E
0x9E
0xAE
0xB0
0x16E
FlexCAN Base
Address Offset
Message Buffer 3
through
Message Buffer 14