Renesas RL78/G1P Hardware User Manual page 474

RL78/G1P
Figure 11-116. Flowchart of SNOOZE Mode Operation (Normal Operation/Abnormal Operation <1>)
INTSREq
Reading receive data to
RxDq (=SDRm1[7:0])
Writing 1 to the STm1 bit
Clear SWCm bit to 0
Writing 1 to the SSmn bit
Error processing
Remarks 1. <1> to <11> in the figure correspond to <1> to <11> in Figure 11-114 Timing Chart of SNOOZE
Mode Operation (Normal Operation Mode) and Figure 11-115 Timing Chart of SNOOZE Mode
Operation (Abnormal Operation <1>).
2. m = 0; q = 0
R01UH0895EJ0100 Rev.1.00
Nov 29, 2019
Setting start
Does TSFmn = 0 on all
channels?
Yes
Writing 1 to the STmn bit
<1>
 SEmn = 0
SAU default setting
Setting SSCm register
<2>
(SWCm = 1, SSECm = 0)
Writing 1 to the SSmn bit
<3>
 SEmn = 1
Enable interrupt
<4>
Entered the STOP mode
<5>
<6>
<7>
<8>
INTSRq
<9>
Reading receive data to
RxDq (=SDRm1[7:0])
<10>
Writing 1 to the STmn bit
<11>
Clear SWCm bit to 0
Writing 1 to the SSmn bit
Normal processing
CHAPTER 11 SERIAL ARRAY UNIT
No
The operation of all channels is also stopped to switch to the
STOP mode.
Channel 1 is specified for UART reception.
(EOCmn: set to enable error interrupt)
SNOOZE mode setting
Communication wait status
Clear interrupt request flag (XXIF), reset interrupt mask (XXMK)
and set interrupt enable (EI = 1).
f supplied to the SAU is stopped.
CLK
RxDq edge detected
(Entered the SNOOZE mode)
Clock supply
(UART receive operation)
Transfer end interrupt (INTSRq) or
error interrupt (INTSREq) generated?
The mode switches from SNOOZE to normal operation.
To operation stop status (SEm1 = 0)
Reset SNOOZE mode setting
To communication wait status (SEmn = 1)
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