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RL78/G1A CHAPTER 12 SERIAL ARRAY UNIT
R01UH0305EJ0200 Rev.2.00 454
Jul 04, 2013
Figure 12-37. Flowchart of Master Reception (in Single-Reception Mode)
Starting CSI communication
Writing dummy data to
SIOp (=SDRmn[7:0])
Write 1 to STmn bit
All reception completed?
No
Yes
End of communication
Reading receive data from
SIO
p
(
=SDRmn
[
7:0
])
For the initial setting, see Figure 12-34.
(Select Transfer end interrupt)
SAU default settin
g
Wait for receive completes
When transfer end interrupt is generated, it moves
to interrupt processing routine
Writing to SIOp makes SCKp signals out
(communication starts)
RETI
Transfer end interrupt
generated?
Setting receive data
Setting storage area of the receive data, number of communication data
(Storage area, Reception data pointer, Number of communication data and
Communication end flag are optionally set on the internal RAM by the software)
Read receive data then writes to storage area.
Update receive data pointer and number of
communication data.
Enables interrupt
Clear interrupt request flag (XXIF), reset interrupt mask (XXMK) and set
interrupt enable (EI)
Disable interrupt (MASK)
Check the number of communication data
Main routine
Main routine
Interrupt processing routine
Remark m: Unit number (m = 0, 1), n: Channel number (n = 0 to 3), p: CSI number (p = 00, 01, 10, 11, 20, 21),
mn = 00 to 03, 10, 11
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