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FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 34 CAN Controller

2.Register Description

(Note)

The Data Length Code of a Message Object must be defined the same as in all the corresponding
objects with the same identifier at other nodes. When the Message Handler stores a data frame, it
will write the DLC to the value given by the received message.

MsgLst

Message Lost (only valid for Message Objects with direction = receive)

0

No message lost since last time this bit was reset by the CPU.

1

The Message Handler stored a new message into this object when NewDat was still set, the
CPU has lost a message.

RxIE

Receive Interrupt Enable

0

IntPnd will be left unchanged after a successful reception of a frame.

1

IntPnd will be set after a successful reception of a frame.

TxIE

Transmit Interrupt Enable

0

IntPnd will be left unchanged after the successful transmission of a frame.

1

IntPnd will be set after a successful transmission of a frame.

IntPnd

Interrupt Pending

0

This message object is not the source of an interrupt.

1

This message object is the source of an interrupt. The Interrupt Identifier in the Interrupt Regis-
ter will point to this message object if there is no other interrupt source with higher priority.

RmtEn

Remote Enable

0

At the reception of a Remote Frame, TxRqst is left unchanged.

1

At the reception of a Remote Frame, TxRqst is set.

TxRqst

Transmit Request

0

This Message Object is not waiting for transmission.

1

The transmission of this Message Object is requested and is not yet done.

DLC3-0

Data Length Code

0-8

Data Frame has 0-8 data bytes.

9-15

Data Frame has 8 data bytes.

Data 0

1st data byte of a CAN Data Frame

Data 1

2nd data byte of a CAN Data Frame

Data 2

3rd data byte of a CAN Data Frame

Data 3

4th data byte of a CAN Data Frame

Data 4

5th data byte of a CAN Data Frame

Data 5

6th data byte of a CAN Data Frame

Data 6

7th data byte of a CAN Data Frame

Data 7

8th data byte of a CAN Data Frame