AT89C51CC02CA-RATUM datasheet(103/156 Pages) ATMEL

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103

AT/T89C51CC02

4126J–CAN–05/06

Table 68. CANPAGE Register

CANPAGE (S:B1h) – CAN Message Object Page Register

Reset Value = xx00 0000b

Table 69. CANCONCH Register

CANCONCH (S:B3h) – CAN Message Object Control and DLC Register

No default value after reset

CHNB 1

CHNB 0

AINC

INDX2

INDX1

INDX0

Bit Number

Bit Mnemonic

Description

7 - 6

Reserved

The values read from these bits are indeterminate. Do not set these

bits.

5 - 4

CHNB3:0

Selection of Message Object Number

The available numbers are: 0 to 3(See Figure 37).

3AINC

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 37).

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: disable

1: Launch transmission

0: Enable Reception

1: Enable Reception Buffer

NOTE: The user must re-write the configuration to enable the

corresponding bit in the CANEN1:2 registers.

5RPLV

Reply valid

Used in the automatic reply mode after receiving a remote frame

0 - reply not ready.

1 - reply ready & valid.

4IDE

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.

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