Datasheet

106
A/T89C51CC01
4129N–CAN–03/08
Table 73. CANPAGE Register
CANPAGE (S:B1h)
CAN Message Object Page Register
Reset Value = 0000 0000b
Table 74. CANCONCH Register
CANCONCH (S:B3h)
CAN Message Object Control and DLC Register
No default value after reset
7 6 5 4 3 2 1 0
CHNB 3 CHNB 2 CHNB 1 CHNB 0 AINC INDX2 INDX1 INDX0
Bit
Number Bit Mnemonic Description
7-4 CHNB3:0
Selection of Message Object Number
The available numbers are: 0 to 14 (see Figure 44).
3 AINC
Auto Increment of the Index (active low)
0 - auto-increment of the index (default value).
1 - non-auto-increment of the index.
2-0 INDX2:0
Index
Byte location of the data field for the defined message object (see Figure 44).
7 6 5 4 3 2 1 0
CONCH 1 CONCH 0 RPLV IDE DLC 3 DLC 2 DLC 1 DLC 0
Bit
Number Bit Mnemonic Description
7-6 CONCH1:0
Configuration of Message Object
CONCH1 CONCH0
0 0: disable
0 1: Launch transmission
1 0: Enable Reception
1 1: Enable Reception Buffer
Note: The user must re-write the configuration to enable the corresponding bit
in the CANEN1:2 registers.
5 RPLV
Reply Valid
Used in the automatic reply mode after receiving a remote frame
0 - reply not ready.
1 - reply ready and valid.
4 IDE
Identifier Extension
0 - CAN standard rev 2.0 A (ident = 11 bits).
1 - CAN standard rev 2.0 B (ident = 29 bits).
3-0 DLC3:0
Data Length Code
Number of Bytes in the data field of the message.
The range of DLC is from 0 up to 8.
This value is updated when a frame is received (data or remote frame).
If the expected DLC differs from the incoming DLC, a warning appears in the
CANSTCH register.