Fujitsu MB96300 series Hardware Manual page 542

CHAPTER 20 USART
START
Initial setting :
Set operation mode 3
Serial data output enabled
Baudrate setting
Synch break length setting
TXE=1, TIE=0
RXE=0, RIE=1
Connection with UART and ICU
Reception prohibited
ICU interrupt enabled
Synch break interrupt enabled
Synch break detection clear
ECCR : LBD=0
Synch break interrupt prohibited
ICU data read
ICU interrupt flag clear
ICU data read
Baud rate regulation
Reception enabled
ICU interrupt flag clear
ICU interrupt prohibited
Identify field reception
Sleep mode?
Yes
Wake up reception?
Yes
534
Figure 20.7-18 USART LIN slave flow chart
LBD=1
Synch break interrupt
ICU interrupt
ICU interrupt
Reception prohibited
RDRF = 1
receive interrupt
No
No
No
Wake up
transmission?
Yes
MB96300 Super Series Hardware Manual
Yes (reception) Data field
reception?
RDRF=1
Reception interrupt
Data 1 reception
RDRF=1
Reception interrupt
Data N reception
Without error
Yes
Wake up code transmission
No (transmission)
Transmission data 1 set
TDR=Data 1
Transmission interrupt
enabled
TDRE=1
Transmission interrupt
Transmission data N set
TDR=Data N
Transmission interrupt
prohibited
RDRF=1
Reception interrupt
Data 1 reception
Data 1 read
RDRF=1
Reception interrupt
Data N reception
Data N read
Reception prohibited
No
Error processing