Renesas RL78/G1H User Manual

RL78/G1H CHAPTER 14 SERIAL ARRAY UNIT
R01UH0575EJ0120 Rev. 1.20 Page 361 of 920
Dec 22, 2016
Figure 14 - 29 Flowchart of Master Transmission (in Single-Transmission Mode)
Note For the initial setting, refer to Figure 14 - 25.(Select Transfer end interrupt)
SAU default setting
Starting CSI communication
Wait for transmit completes
End of communication
Clear interrupt request flag (XXIF), reset interrupt mask (XXMK) and set
interrupt enable (EI).
Writing transmit data to
SIOp (= SDRmn [7:0])
Yes
No
Setting transmit data
Set data for transmission and the number of data. Clear communication end flag
(Storage area, Transmission data pointer, Number of communication data and
Communication end flag are optionally set on the internal RAM by the software)
Enables interrupt
Writing transmit data to
SIOp (= SDRmn [7:0])
Read transmit data from storage area and write it
to SIOp. Update transmit data pointer.
Writing to SIOp makes SOp and
SCKp signals out
(communication starts)
Transmitting next data?
Transfer end interrupt
When Transfer end interrupt is generated , it
moves to interrupt processing routine
No
Sets communication
completion flag
Read transmit data, if any, from storage area and
write it to SIOp. Update transmit data pointer.
If not, set transmit end flag
RETI
Transmission completed?
Disable interrupt (MASK)
Write STmn bit to 1
Check completion of transmission by
verifying transmit end flag
Yes
Main routineInterrupt processing routineMain routine
Note

Renesas RL78/G1H Specifications

General

Brand	Renesas
Model	RL78/G1H
Category	Microcontrollers
Language	English