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S9S12GN48F0CLH Datasheet, PDF (605/1292 Pages) Freescale Semiconductor, Inc – MC9S12G Family Reference Manual and Data Sheet | |||
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Module Base + 0x0010 to Module Base + 0x0013
7
R
AC7
W
6
AC6
5
AC5
Reset
0
0
0
Freescaleâs Scalable Controller Area Network (S12MSCANV3)
Access: User read/write1
4
3
2
1
0
AC4
AC3
AC2
AC1
AC0
0
0
0
0
0
Figure 18-20. MSCAN Identiï¬er Acceptance Registers (First Bank) â CANIDAR0âCANIDAR3
1 Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
Table 18-22. CANIDAR0âCANIDAR3 Register Field Descriptions
Field
7-0
AC[7:0]
Description
Acceptance Code Bits â AC[7:0] comprise a user-deï¬ned sequence of bits with which the corresponding bits
of the related identiï¬er register (IDRn) of the receive message buffer are compared. The result of this comparison
is then masked with the corresponding identiï¬er mask register.
Module Base + 0x0018 to Module Base + 0x001B
Access: User read/write1
7
R
AC7
W
Reset
0
6
AC6
0
5
AC5
0
4
AC4
0
3
AC3
0
2
AC2
0
1
AC1
0
0
AC0
0
Figure 18-21. MSCAN Identiï¬er Acceptance Registers (Second Bank) â CANIDAR4âCANIDAR7
1 Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
Table 18-23. CANIDAR4âCANIDAR7 Register Field Descriptions
Field
7-0
AC[7:0]
Description
Acceptance Code Bits â AC[7:0] comprise a user-deï¬ned sequence of bits with which the corresponding bits
of the related identiï¬er register (IDRn) of the receive message buffer are compared. The result of this comparison
is then masked with the corresponding identiï¬er mask register.
18.3.2.18 MSCAN Identiï¬er Mask Registers (CANIDMR0âCANIDMR7)
The identiï¬er mask register speciï¬es which of the corresponding bits in the identiï¬er acceptance register
are relevant for acceptance ï¬ltering. To receive standard identiï¬ers in 32 bit ï¬lter mode, it is required to
program the last three bits (AM[2:0]) in the mask registers CANIDMR1 and CANIDMR5 to âdonât care.â
To receive standard identiï¬ers in 16 bit ï¬lter mode, it is required to program the last three bits (AM[2:0])
in the mask registers CANIDMR1, CANIDMR3, CANIDMR5, and CANIDMR7 to âdonât care.â
MC9S12G Family Reference Manual, Rev.1.23
Freescale Semiconductor
607
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