Filter
Top Products
440
CHAPTER 20 LIN-UART
■ LIN-UART as LIN slave device
Figure 20.7-19 LIN-UART LIN Slave Flowchart
Y
N
N
Y
Y
N
YN
Y
N
Start
Initial setting :
Set operation mode 3
Serial data output enabled
TXE = 1, TIE = 0, RXE = 0, RIE = 1
Connection with LIN-UART and ICU
ICU data read
Baud rate regulation
Reception enabled
ICU interrupt flag clear
ICU interrupt prohibited
LBD = 1
Synch break interrupt
Identify field reception*
1
Reception prohibited
ICU interrupt enabled
Synch break interrupt
enabled
Without error?
Error processing*
2
Data Field
reception ?
Transmission data 1 set
TDR = Data 1
Transmission interrupt
enabled
ICU data read
ICU interrupt flag clear
ICU interrupt
ICU interrupt
(reception)
(transmission)
RDRF = 1
Reception interrupt
Data 1 reception*
1
Data N reception*
1
RDRF = 1
Reception interrupt
Transmission data N set
TDR = Data N
Transmission interrupt pro-
hibited
Data 1 reception*
1
Data 1 read
Data N reception*
1
Data N read
Reception prohibited
TDRE = 1
Transmission interrupt
RDRF = 1
Reception interrupt
RDRF = 1
Reception interrupt
*1: If an error occurs, perform the error processing
*2: • When fre and ore is "1", write 1 to SCR: CRE bit and clear the error flag.
• When ESCR: LBD bit is "1", execute UART reset.
Note: The error is detected in each processing and take appropriate measure.
Synch Break detection clear
ECCR: LBD = 0
Synch break interrupt pro-
hibited
RDRF = 1
Reception interrupt
Sleep
mode?
Wake up
reception?
Wake up
transmission?
Reception prohibited
Wake up code transmission