Controller Area Network (FlexCAN)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
25-20
Freescale Semiconductor
Preliminary
25.3.4.4.2
Rx 14 Mask (CANx_RX14MASK)
This register is provided for legacy support. On MPC5510, setting the BCC bit in CANx_MCR causes the
CANx_RX14MASK Register to have no effect on the module operation.
CANx_RX14MASK is used as acceptance mask for the Identifier in Message Buffer 14. When the FEN
bit in CANx_MCR is set (FIFO enabled), the CANx_RX14MASK also applies to element 6 of the ID filter
table. This register has the same structure as the Rx Global Mask Register. It must be programmed while
the module is in Freeze Mode, and must not be modified when the module is transmitting or receiving
frames.
•
Address Offset: 0x14
•
Reset Value: 0xFFFF_FFFF
25.3.4.4.3
Rx 15 Mask (CANx_RX15MASK)
This register is provided for legacy support. On MPC5510, setting the BCC bit in CANx_MCR causes the
CANx_RX15MASK Register to have no effect on the module operation.
When the BCC bit is negated, CANx_RX15MASK is used as acceptance mask for the Identifier in
Message Buffer 15. When the FEN bit in CANx_MCR is set (FIFO enabled), the CANx_RX14MASK also
applies to element 7 of the ID filter table. This register has the same structure as the Rx Global Mask
Register. It must be programmed while the module is in Freeze Mode, and must not be modified when the
module is transmitting or receiving frames.
•
Address Offset: 0x18
•
Reset Value: 0xFFFF_FFFF
Offset: Base + 0x0010
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
MI31
MI30
MI29
MI28
MI27
MI26
MI25
MI24
MI23
MI22
MI21
MI20
MI19
MI18
MI17
MI16
W
Reset
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
MI15
MI14
MI13
MI12
MI11
MI10
MI9
MI8
MI7
MI6
MI5
MI4
MI3
MI2
MI1
MI0
W
Reset
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Figure 25-8. Rx Mask Register (CANx_RXGMASK)
Table 25-10. CANx_RXGMASK Field Descriptions
Field
Description
MIn
Mask Bits. For normal Rx MBs, the mask bits affect the ID filter programmed on the MB. For the Rx FIFO,
the mask bits affect all bits programmed in the filter table (ID, IDE, RTR).
0 the corresponding bit in the filter is “don’t care”
1 The corresponding bit in the filter is checked against the one received