Fujitsu FR81S User Manual
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
104
[bit3] LTDRCL: Transmission data register clear bit
This bit clears the transmission data register (TDR).
"1": The transmission data register is reset.
"0": There is no influence on the operation. The read value is always "0".
LTDRCL
Transmission data register clear bit
write
read
0
No influence
The read value is always "0"
1
The transmission data register (TDR)
is cleared
Notes:
⋅
This function is effective only in the LIN assist mode (LAMCR:LAMEN="1").
⋅
A transmission FIFO is not reset even though the transmission data register is cleared.
⋅
When the transmission FIFO is used, be sure to clear the transmission data register after clearing the
transmission FIFO (FCR0:FCL1 or FCR0:FCL2).
[bit2] LCSTYP: LIN checksum type selection bit
The checksum type of LIN is selected by this bit.
LCSTYP
LIN checksum type selection bit
0
Standard checksum
1
Extended checksum
Notes:
⋅
This function is effective only in the LIN assist mode (LAMCR:LAMEN="1").
⋅
Be sure to set this setting before transmitting/receiving the response part of the data.
[bit1] LIDEN: LIN ID register use enable bit
This bit enables the use of the LIN assist mode transmission/reception ID register (LAMTID/LAMRID).
⋅
In master mode: (SCR:MS=0)
"0": The transmission data register (TDR) is used in order to transmit the LIN ID Field.
"1": The LIN assist mode transmission ID register (LAMTID) is used in order to transmit the LIN ID
Field.
⋅
In slave mode: (SCR:MS=1)
"0": The reception data register (RDR) is used in order to receive the LIN ID Field.
"1": The LIN assist mode reception ID register (LAMRID) is used in order to receive the LIN ID Field.
LIDEN
LIN ID register use enable bit
Transmission
Reception
0
Transmission data register (TDR) is used
Reception data register (RDR) is used
1
LIN assist mode transmission ID register
(LAMTID) is used
LIN assist mode reception ID register
(LAMRID) is used
MB91520 Series
MN705-00010-1v0-E
1417