Fujitsu FR81S User Manual
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
7. Operation of LIN Interface (v2.1)
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
FUJITSU SEMICONDUCTOR CONFIDENTIAL
299
Figure 7-49 LIN bus timing (ID register unused, DATA Field reception, and FIFO unused)
LIN bus
LIN Break
LIN Break
delimiter
SCR : RXE
SSR : RDRF
Sync Field
SCR : LBR
SCR : TIE
SCR : RIE
SCR : TXE
LAMTID
SSR : TDRE
ID Field
Data 1
Data 2
Data 3
Data (N-2)
TDR
LAMCR : LIDEN
TDR write
ID Field value
is TDR use
is TDR use
ID Field value is set to
TDR register.
TDR register.
Reception interrupt generation：
DATA read
DATA read
LIN Break start
LAMCR : LAMEN
H : assist mode processing enable
LAMSR : LAHC
LIN auto header
Transmission complete flag
Transmission complete flag
L : TDR register use
Response
space
checksum
Data N
Data (N-1)
H : reception interrupt enable
H : reception enable
Checksum operation complete
RDR read
LAMRID
L : transmission disable
L : transmission interrupt disable
LAMSR : LCSC
ID Field
RDR
Data 1
Data 2
Data (N-3)
Data (N-2)
Data (N-1)
Data N
：Don’t care
L : reception disable
SSR : TBI
Figure 7-50 LIN bus timing (ID register use, DATA Field transmission, and FIFO use)
Transmission
FBYTE
FBYTE
FCR1 : FDRQ
FCR1 : FTIE
LIN bus
LIN Break
LIN Break
delimiter
SCR : RXE
SSR : RDRF
Sync Field
SCR : LBR
SCR : TIE
SCR : RIE
SCR : TXE
ID Field value
LAMTID
SSR : TDRE
ID Field
Data 1
Data 2
Data 3
Data (N-2)
LAMCR : LIDEN
Transmission FIFO read
(TDR Forwarding)
(TDR Forwarding)
ID Field value
is TDR use
is TDR use
ID Field value is set
to TDR register.
to TDR register.
LIN Break start
LAMCR : LAMEN
H : assist mode processing enable
LAMSR : LAHC
LIN auto header
Transmission complete flag
Transmission complete flag
H : ID register use
Response
space
checksum
Data N
Data (N-1)
LAMSR : LCSC
H : transmission enable
L : reception interrupt disable
ID Field vlue
LAMRID
FIFO write
Data 1
Data 2
Data 3
Data (N-1)
Data N
TDR
Data 4
7
6
5
0
1
4
H : transmission FIFO interrupt enable
L : transmission FIFO data no demand
FTICR1
0 (Number of data that generates transmission interruption)
Transmission FIFO：enable 、reception FIFO：disable
0
L : transmission interrupt disable
：Don’t care
SSR : TBI
L : reception disable
L : transmission disable
MB91520 Series
MN705-00010-1v0-E
1612