Renesas rl78 User Manual
RL78/G1A
CHAPTER 12 SERIAL ARRAY UNIT
R01UH0305EJ0200 Rev.2.00
498
Jul 04, 2013
Figure 12-73. Flowchart of SNOOZE Mode Operation (Continuous Startup)
SCKp edge detected
(Entered the SNOOZE mode)
(Entered the SNOOZE mode)
Supplying a clock to CSIp
(CSIp is receive operation)
(CSIp is receive operation)
TSFmn = 0 for all channels?
No
Yes
Write 1 to STm0 bit
Setting SSCm register
(SWCm = 1, SSECm = 0)
Entered the STOP mode
Reading receive data from
SIOp (=SDRmn[7:0])
Write 1 to STm0 bit
Clear SWCm bit to 0
Write 1 to SSm0 bit
Setting SNOOZE mode
CPU/peripheral hardware clock 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)
generated
(CSIp is receive completion)
Become the operation STOP status (SEm0 = 0)
SAU default setting
SMRm0, SCRm0: Communication setting
SDRm0[15:9]: Setting
0000000B
Enables interrupt
processing
Clear interrupt request flag (XXIF), reset interrupt mask (XXMK)
and enable interrupt processing.
and enable interrupt processing.
N
o
rm
al
o
pe
rat
rat
io
n
S
N
OO
Z
E
m
ode
ode
STOP m
od
e
e
No
rm
rm
al o
per
atio
n
Remarks 1. <1> to <10> in the figure correspond to <1> to <10> in Figure 12-72 Timing Chart of SNOOZE
Mode Operation (Continuous Startup).
2.
m = 0; p = 00
<R>