Renesas rl78 사용자 설명서
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
SIOp (=SDRmn[7:0])
For the initial setting, see Figure 12-34.
(Select Transfer end interrupt)
(Select Transfer end interrupt)
SAU default setting
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 r
outine
In
te
rr
u
pt
p
roc
es
sin
g
es
sin
g
ro
u
tin
e
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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