Fujitsu FR81S User Manual
CHAPTER 41: CAN
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: CAN
FUJITSU SEMICONDUCTOR CONFIDENTIAL
30
(2) Test basic mode
IF1 command request register
BUSY
Function
0
Disables the message transmission.
1
Enables the message transmission.
IF2 command request register
BUSY
Function
0
Disables the message reception.
1
Enables the message reception.
[bit14 to bit8] : Reserved bit
The read value is always "0". When writing to these bits, set "0".
[bit7 to bit0] Message Number : Message Number (For 64 message buffer CAN)
Message
Number
Function
00
H
Setting prohibited. If this value is set, it is interpreted as 40
H
and 40
H
is read out.
01
H
to 40
H
Sets the message number for processing.
41
H
to FF
H
Setting prohibited. If this value is set, it is interpreted as 01
H
to 3F
H
and the value
interpreted is read out.
[bit7 to bit0] Message Number : Message Number (For 128 message buffer CAN)
Message
Number
Function
00
H
Setting prohibited. If this value is set, it is interpreted as 80
H
and 80
H
is read out.
01
H
to 80
H
Sets the message number for processing.
81
H
to FF
H
Setting prohibited. If this value is set, it is interpreted as 01
H
to 7F
H
and the value
interpreted is read out.
Note:
The BUSY bit is readable/writable. Other than in the test basic mode, it does not affect the operation no
matter which value is written to this bit. (See "5.7 Test Mode" for the details of the basic mode.)
MB91520 Series
MN705-00010-1v0-E
1723