
RL78/G1P
CHAPTER 11 SERIAL ARRAY UNIT
R01UH0895EJ0100 Rev.1.00
393
Nov 29, 2019
Figure 11-71. Flowchart of SNOOZE Mode Operation (Once Startup)
SCKp edge detected
(Entered the SNOOZE mode)
Supplying a clock to CSIp
(CSIp is receive operation)
TSFmn = 0 for all channels?
No
Yes
Write STm0 bit to 1
SAU default setting
Setting SSCm register
(SWCm = 1, SSECm = 0)
Entered the STOP mode
Reading receive data to
SIOp (=SDRmn[7:0])
Write STm0 bit to 1
Write SWCm bit to 1
Write SSm0 bit to 1
Setting SNOOZE mode
f
CLK
supplied to the SAU is stopped.
<1>
<2>
<3>
<4>
<5>
<7>
<8>
<9>
<10>
Reset SNOOZE mode setting
<6>
The mode switches from SNOOZE to normal operation.
Become the communication wait status (SEm0 = 1)
SNOOZE mode operation
Transfer interrupt (INTCSIp) is
generated
(CSIp is receive completion)
End of SNOOZE mode
Write SSm0 bit to 1
<11>
Become the operation STOP status (SEm0 = 0)
SMRm0, SCRm0 : Communication setting
SDRm0[15:9] :
Setting 0000000B
Become the operation STOP status (SEm0 = 0)
It becomes communication ready state (SEm0 = 1) under
normal operation
Clear interrupt request flag (XXIF), reset interrupt mask (XXMK)
and set interrupt enable (EI).
Enables interrupt
No
rm
al op
erat
io
n
SNO
O
ZE mod
e
S
T
OP
m
o
d
e
No
rm
a
l op
er
at
ion
Remarks 1.
<1> to <11> in the figure correspond to <1> to <11> in
Figure 11-70 Timing Chart of SNOOZE
Mode Operation (Once Startup)
.
2.
m = 0; p = 00