AT89C51CC02CA-RATUM datasheet(99/156 Pages) ATMEL

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AT/T89C51CC02

4126J–CAN–05/06

Table 62. CANEN Register

CANEN (S:CFh Read Only)

CAN Enable Message Object Registers

Reset Value = xxxx 0000b

Table 63. CANSIT Register

CANSIT (S:BBh Read Only) – CAN Status Interrupt Message Object Registers

Reset Value = xxxx0000b

ENCH3

ENCH2

ENCH1

ENCH0

Bit Number

Bit Mnemonic

Description

7 - 4

Reserved

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

bits.

3 - 0

ENCH3:0

Enable Message Object

0 - message object is disabled => the message object is free for a

new emission or reception.

1 - message object is enabled.

This bit is resetable by re-writing the CANCONCH of the

corresponding message object.

SIT3

SIT2

SIT1

SIT0

Bit Number

Bit Mnemonic

Description

7 - 4

Reserved

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

bits.

3 - 0

SIT3:0

Status of Interrupt by Message Object

0 - no interrupt.

1 - IT turned on. Reset when interrupt condition is cleared by user.

SIT3:0 = 0b 0000 1001 -> IT’s on message objects 3 & 0.

See Figure 39.

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