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

298

Figure 7-47 LIN bus timing (ID register unused, DATA Field transmission, and FIFO unused)

LIN bus

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

ID Field value is set to
TDR register.

Transmission interrupt generation：
DATA Field set

Data 1

Data 2

Data 3

Data 4

Data (N-1)

LIN Break start

LAMCR : LAMEN

H : assist mode processing enable

LAMSR : LAHC

LIN auto header
Transmission complete flag

L : TDR use

Response

space

checksum

Data N

Data (N-1)

Data N

checksum

LAMSR : LCSC

H : transmission interrupt enable

：Don’t care

SSR : TBI

L : reception disable

H : transmission enable

L : transmission disable

L : reception interrupt disable

Figure 7-48 LIN bus timing (ID register use, DATA Field reception, and FIFO unused)

LIN bus

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

ID Field value is set
to TDR register.

Reception interrupt generation：
DATA read

LIN Break start

LAMCR : LAMEN

H : assist mode processing enable

LAMSR : LAHC

LIN auto header
Transmission complete flag

H : ID register use

Response

space

checksum

Data N

Data (N-1)

H : reception interrupt enable

H : reception enable

Checksum operation
complete

RDR

RDR read

Data 1

Data 2

Data (N-3)

Data (N-2)

Data (N-1)

Data N

ID Field value

LAMRID

L : transmission disable

L : transmission interrupt disable

LAMSR : LCSC

：Don’t care

L : reception disable

SSR : TBI

MB91520 Series

MN705-00010-1v0-E

1611