Circuit Board Reference Manual

MCF548x Reference Manual, Rev. 3
21-12 Freescale Semiconductor
21.3.2.4.1 FlexCAN Rx Global Mask Register (RXGMASK)
The Rx global mask bits are applied to all Rx identifiers, excluding Rx buffers 14–15 that have their
specific Rx mask registers. Access to this register is unrestricted.
Rx_Msg in
2
1 1 1 1 1 1 1 1 0 0 1 0 2
2
Rx_Msg in
3
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
4
0 1 1 1 1 1 1 1 0 0 0 0
4
Rx_Msg in
5
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
5
RX14MASK 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
6
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
7
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 Normal Format. (MB2).
3
Mismatch for MB3 because of ID0.
4
Mismatch for MB2 because of ID28.
5
Mismatch for MB3 because of ID28, Match for MB14 (Uses RX14MASK).
6
Mismatch for MB14 because of ID27 (Uses RX14MASK).
7
Match for MB14 (Uses RX14MASK).
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R 0 0 0 MI28 MI27 MI26 MI25 MI24 MI23 MI22 MI21 MI20 MI19 MI18 MI17 MI16
W
Reset0001111111111111
1514131211109876543210
R MI15 MI14 MI13 MI12 MI11 MI10 MI9 MI8 MI7 MI6 MI5 MI4 MI3 MI2 MI1 MI0
W
Reset1111111111111111
Reg
Addr
MBAR + 0xA010 (RXGMASK0); 0xA810 (RXGMASK1)
Figure 21-7. FlexCAN Rx Global Mask Register (RXGMASK)
Table 21-5. RXGMASK Field Descriptions
Bits Name Description
31–29 — Reserved, should be cleared.
Table 21-4. Mask Examples for Normal/Extended Messages (Continued)
Base ID
ID28.................ID18
IDE
Extended ID
ID17......................................ID0
Match