MC9S12P128 Datasheet, PDF (275/564 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

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
0x00X4
DSR0
R
W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0x00X5
DSR1
R
W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0x00X6
DSR2
R
W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0x00X7
DSR3
R
W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0x00X8
DSR4
R
W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0x00X9
DSR5
R
W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0x00XA
DSR6
R
W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0x00XB
DSR7
R
W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0x00XC ^R
DLR
W
DLC3
DLC2
DLC1
DLC0
= 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. 1.12
Freescale Semiconductor
275