MC9S12GRMV1 Datasheet, PDF (606/1292 Pages) Freescale Semiconductor, Inc – MC9S12G Family Reference Manual and Data Sheet

Freescale’s Scalable Controller Area Network (S12MSCANV3)
Module Base + 0x0014 to Module Base + 0x0017
R
W
Reset
7
AM7
0
6
AM6
0
5
AM5
0
4
AM4
0
3
AM3
0
2
AM2
0
Access: User read/write¹
1
0
AM1
AM0
0
0
Figure 18-22. MSCAN Identifier Mask Registers (First Bank) — CANIDMR0–CANIDMR3
1 _{Read: Anytime}
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
Table 18-24. CANIDMR0–CANIDMR3 Register Field Descriptions
Field
7-0
AM[7:0]
Description
Acceptance Mask Bits — If a particular bit in this register is cleared, this indicates that the corresponding bit in
the identifier acceptance register must be the same as its identifier bit before a match is detected. The message
is accepted if all such bits match. If a bit is set, it indicates that the state of the corresponding bit in the identifier
acceptance register does not affect whether or not the message is accepted.
0 Match corresponding acceptance code register and identifier bits
1 Ignore corresponding acceptance code register bit
Module Base + 0x001C to Module Base + 0x001F
R
W
Reset
7
AM7
0
6
AM6
0
5
AM5
0
4
AM4
0
3
AM3
0
2
AM2
0
Access: User read/write¹
1
0
AM1
AM0
0
0
Figure 18-23. MSCAN Identifier Mask Registers (Second Bank) — CANIDMR4–CANIDMR7
1 _{Read: Anytime}
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
Table 18-25. CANIDMR4–CANIDMR7 Register Field Descriptions
Field
7-0
AM[7:0]
Description
Acceptance Mask Bits — If a particular bit in this register is cleared, this indicates that the corresponding bit in
the identifier acceptance register must be the same as its identifier bit before a match is detected. The message
is accepted if all such bits match. If a bit is set, it indicates that the state of the corresponding bit in the identifier
acceptance register does not affect whether or not the message is accepted.
0 Match corresponding acceptance code register and identifier bits
1 Ignore corresponding acceptance code register bit
MC9S12G Family Reference Manual, Rev.1.23
608
Freescale Semiconductor