Table 77. CANIDM4 Register for V2.0 part A
CANIDM4 for V2.0 part A (S:C7h)
CAN Identifier Mask Registers 4
7
6
5
4
3
2
1
0
-
-
-
-
-
RTRMSK
-
IDEMSK
Bit
Number Bit Mnemonic Description
7-3
-
Reserved
The values read from these bits are indeterminate. Do not set these bits.
Remote Transmission Request Mask Value
2
RTRMSK 0 - comparison true forced.
1 - bit comparison enabled.
1
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
IDentifier Extension Mask Value
0
IDEMSK 0 - comparison true forced.
1 - bit comparison enabled.
Note: The ID Mask is only used for reception.
No default value after reset.
Table 78. CANIDM1 Register for V2.0 part B
CANIDM1 for V2.0 part B (S:C4h)
CAN Identifier Mask Registers 1
7
6
5
4
3
2
1
0
IDMSK 28 IDMSK 27 IDMSK 26 IDMSK 25 IDMSK 24 IDMSK 23 IDMSK 22 IDMSK 21
Bit
Number Bit Mnemonic Description
IDentifier Mask Value
7-0
IDMSK28:21
0 - comparison true forced.
1 - bit comparison enabled.
See Figure 54.
Note: The ID Mask is only used for reception.
No default value after reset.
124 AT89C51CC03
4182K–CAN–05/06