Rainbow Electronics T89C51CC02 - Manual (Page 90)

90 Rev.A - May 17, 2001
Preliminary
T89C51CC02
CANCONCH (S:B3h)
CAN message object Control and DLC Register
No default value after reset
Figure 78. CANCONCH Register
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: Transmitter
1 0: Receiver
1 1: Receiver 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 & 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.
See Figure 62.