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
301
Figure 7-52 LIN bus timing (ID register use, DATA Field reception, and FIFO use)
Transmission
FBYTE
FBYTE
FCR1 : FDRQ
FCR1 : FTIE
Reception
FBYTE(setting)
FBYTE(setting)
Reception
FBYTE(display)
FBYTE(display)
1
0
N
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)
TDR
LAMCR : LIDEN
TDR write
ID Field value
is TDR use
is TDR use
ID Field value is
set to ID register.
set to ID 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)
L : transmission interrupt disable
L : transmission disable
L : reception interrupt disable
H : reception enable
Checksum operation complete
RDR
RDR read
Data 1
Data N
ID Field value
LAMRID
N-3
N-2
N-1
N
Reception interrupt generation：
reception FIFO read
reception FIFO read
：Don’t care
LAMSR : LCSC
0
L : reception disable
Data 1
Figure 7-53 LIN bus timing (ID register unused, DATA Field reception, and FIFO use)
Transmission
FBYTE
FBYTE
FCR1 : FDRQ
FCR1 : FTIE
Reception
FBYTE(setting)
FBYTE(setting)
Reception
FBYTE(display)
FBYTE(display)
1
0
N
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)
TDR
LAMCR : LIDEN
TDR write
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
L : TDR use
Response
space
checksum
Data N
Data (N-1)
L : transmission interrupt disable
L : transmission disable
L : reception interrupt disable
H : reception enable
Checksum operation complete
RDR
RDR read
Data 1
Data N
LAMRID
N-3
N-2
N-1
N
Reception interrupt generation：
reception FIFO read
reception FIFO read
：Don’t care
LAMSR : LCSC
0
L : reception disable
Data 1
MB91520 Series
MN705-00010-1v0-E
1614