Renesas RL78/G13 - Page 678

RL78/G13 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0146EJ0100 Rev.1.00 659
Sep 22, 2011
(2) SNOOZE mode operation (Abnormal Operation <1>)
Abnormal operation <1> is the operation performed when a communication error occurs while SSECm = 0.
Because SSECm = 0, an error interrupt (INTSREq) is generated when a communication error occurs.
Figure 12-92. Timing Chart of SNOOZE Mode Operation (Abnormal Operation <1>)
SSm1
SEm1
SWCm
SSECm L
SDRm1
INTSRq
INTSREq
L
TSFm1
STm1
P
ST
P
SP SP
ST
RxDq pin
CPU operation status
Normal peration Normal perationSTOP mode
Clock request signal
(internal signal)
SNOOZE mode
<10>,
<11>
<1> <2> <3> <5>
<7>
<6>
<8>
<4>
Shift
register m1
Data reception (7-bit length)Data reception (7-bit length)
Receive data 2
Receive data 2
Receive data 1
Receive data 1
Shift operationShift operation
Caution Before switching to the SNOOZE mode or after reception operation in the SNOOZE mode
finishes, be sure to set the STm1 bit to 1 and clear the SEm1 bit (to stop the operation).
Remarks 1. <1> to <11> in the figure correspond to <1> to <11> in Figure 12-93. Flowchart of SNOOZE Mode
Operation (Normal Operation/Abnormal Operation <1>).
2. 24 to 64-pin products: m = 0; q = 0
80, 100, 128-pin products: m = 0, 1; q = 0, 2
<R>