Rainbow-electronics T89C51CC02 Manual de usuario descargar pdf (Pagina 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.

1 2 ... 85 86 87 88 89 90 91 92 93 94 95 ... 136 137

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Rainbow-electronics T89C51CC02 Manual de usuario Pagina 90