Microcontroller User's Manual

MOTOROLA Chapter 25. FlexCAN 25-27
Programmer’s Model
25.5.7.1 Receive Mask Registers (RXGMASK, RX14MASK, RX15MASK)
The Rx global mask register (RXGMASK) is composed of 4 bytes. The mask bits are
applied to all Rx-Identifiers excluding Rx-buffers 14-15, that have their specific Rx-mask
registers (RX14MASK and RX15MASK).
MB14-Id 1 1 1 1 1 1 1 1 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
Rx_Global_Mas
k
1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1
Rx_Msg in 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 3
1
Rx_Msg in 1 1 1 1 1 1 1 1 0 0 1 0 2
2
Rx_Msg in 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0
3
Rx_Msg in 0 1 1 1 1 1 1 1 0 0 0 0
4
Rx_Msg in 0 1 1 1 1 1 1 1 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
5
Rx_14_Mask 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0
Rx_Msg in 1 0 1 1 1 1 1 1 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
6
Rx_Msg in 0 1 1 1 1 1 1 1 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 14
7
1
Match for Extended Format (MB3).
2
Match for Standard Format. (MB2).
3
Un-Match for MB3 because of ID0.
4
Un-Match for MB2 because of ID28.
5
Un-Match for MB3 because of ID28, Match for MB14.
6
Un-Match for MB14 because of ID27.
7
Match for MB14.
31 21 20 19 18 17 16
Field MID[28:18] — MID[17:15]
Reset 1111_1111_1110_1111
R/W R/W
15 10
Field MID[14:0] —
Reset 1111_1111_1111_1110
R/W R/W
Address IPSBAR + 0x1C_0010 (RXGMASK), 0x1C_0014 (RX14MASK), 0x1C_0018 (RX15MASK)
Figure 25-12. Rx Mask Registers (RXGMASK, RX14MASK, and RX15MASK)
Table 25-15. Mask examples for Normal/Extended Messages (continued)
Base ID
ID28.................ID18
I
D
E
Extended ID
ID17......................................ID0
Match