AT89C51CC03U-RDTIM datasheet(126/195 Pages) ATMEL

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126

AT89C51CC03

4182I–CAN–06/05

Table 81. CANIDM4 Register for V2.0 part B

CANIDM4 for V2.0 part B (S:C7h)

CAN Identifier Mask Registers 4

Note:

The ID Mask is only used for reception.

No default value after reset.

Table 82. CANMSG Register

CANMSG (S:A3h)

CAN Message Data Register

No default value after reset.

543

210

IDMSK 4

IDMSK 3

IDMSK 2

IDMSK 1

IDMSK 0

RTRMSK

IDEMSK

Bit

Number

Bit Mnemonic Description

7-3

IDMSK4:0

IDentifier Mask Value

0 - comparison true forced.

1 - bit comparison enabled.

See Figure 54.

2RTRMSK

Remote Transmission Request Mask Value

0 - comparison true forced.

1 - bit comparison enabled.

Reserved

The value read from this bit is indeterminate. Do not set this bit.

0IDEMSK

IDentifier Extension Mask Value

0 - comparison true forced.

1 - bit comparison enabled.

543

210

MSG 7

MSG 6

MSG 5

MSG 4

MSG 3

MSG 2

MSG 1

MSG 0

Bit

Number

Bit Mnemonic Description

7-0

MSG7:0

Message Data

This register contains the mailbox data byte pointed at the page message

object register.

After writing in the page message object register, this byte is equal to the

specified message location (in the mailbox) of the pre-defined identifier +

index. If auto-incrementation is used, at the end of the data register writing or

reading cycle, the mailbox pointer is auto-incremented. The range of the

counting is 8 with no end loop (0, 1,..., 7, 0,...)

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