Renesas rl78 User Manual
RL78/G1A
CHAPTER 12 SERIAL ARRAY UNIT
R01UH0305EJ0200 Rev.2.00
525
Jul 04, 2013
(2) SNOOZE mode operation (EOCm1 = 1, SSECm = 0: error interrupt (INTSRE0) generation enable)
Because EOCm1 = 1, SSECm = 0, an error interrupt (INTSREq) is generated when a communication error occurs.
Figure 12-90. Timing Chart of SNOOZE Mode Operation (EOCm1 = 1, SSECm = 0)
SS01
SE01
SWC0
SSEC0
L
SDR01
INTSR0
INTSRE0 L
TSF01
<1>
<2>
<3>
<5> <6>
<8>
<7>
<3>
<4>
ST01
RxD0 pin
P
ST
P
SP
SP
ST
<10>
<11>
<12>
CPU operation status
Normal operation
STOP mode
SNOOZE mode
Normal operation
Clock request signal
(internal signal)
Shift
register 01
Receive data 1
Receive data 1
Receive data 2
Receive data 2
Shift operation
Shift operation
Data reception
Data reception
EOC01
Caution Before switching to the SNOOZE mode or after reception operation in the SNOOZE mode
finishes, set the STm1 bit to 1 (clear the SEm1 bit, and stop the operation).
And after completion the receive operation, also clearing SWCm bit to 0 (SNOOZE mode release).
Remarks 1. <1> to <11> in the figure correspond to <1> to <11> in Figure 12-91 Flowchart of SNOOZE Mode
Operation (EOCm1 = 0, SSECm = 0/1 or EOCm1 = 1, SSECm = 0).
2.
m = 0
<R>