Freescale’s Scalable Controller Area Network (S12MSCANV3)
Figure 8-24. Receive/Transmit Message Buffer — Extended Identifier Mapping (continued)
Register
Name
Bit 7
6
5
4
3
2
1
Bit0
R
0x00X4
DSR0
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
W
R
0x00X5
DSR1
DB7
DB7
DB7
DB7
DB7
DB7
DB7
DB6
DB6
DB6
DB6
DB6
DB6
DB6
DB5
DB5
DB5
DB5
DB5
DB5
DB5
DB4
DB4
DB4
DB4
DB4
DB4
DB4
DB3
DB3
DB3
DB3
DB3
DB3
DB3
DLC3
DB2
DB2
DB2
DB2
DB2
DB2
DB2
DLC2
DB1
DB1
DB1
DB1
DB1
DB1
DB1
DLC1
DB0
DB0
DB0
DB0
DB0
DB0
DB0
DLC0
W
R
0x00X6
DSR2
W
R
0x00X7
DSR3
W
R
0x00X8
DSR4
W
R
0x00X9
DSR5
W
R
0x00XA
DSR6
W
R
0x00XB
DSR7
W
R
0x00XC
DLR
W
= Unused, always read ‘x’
Read:
•
For transmit buffers, anytime when TXEx flag is set (see Section 8.3.2.7, “MSCAN Transmitter
Flag Register (CANTFLG)”) and the corresponding transmit buffer is selected in CANTBSEL (see
Section 8.3.2.11, “MSCAN Transmit Buffer Selection Register (CANTBSEL)”).
•
For receive buffers, only when RXF flag is set (see Section 8.3.2.5, “MSCAN Receiver Flag
Register (CANRFLG)”).
Write:
S12P-Family Reference Manual, Rev. 1.13
Freescale Semiconductor
277
FREESCALE [ Freescale ]
