RL78/G1P
CHAPTER 16 STANDBY FUNCTION
R01UH0895EJ0100 Rev.1.00
600
Nov 29, 2019
16.3.2 STOP mode
(1) STOP mode setting and operating statuses
The STOP mode is set by executing the STOP instruction, and it can be set only when the CPU clock before the
setting was the high-speed on-chip oscillator clock, X1 clock, or external main system clock.
Cautions 1. Because the interrupt request signal is used to clear the STOP mode, if the interrupt mask flag
is 0 (the interrupt processing is enabled) and the interrupt request flag is 1 (the interrupt
request signal is generated), the STOP mode is immediately cleared if set when the STOP
instruction is executed in such a situation.
Accordingly, once the STOP instruction is executed, the system returns to its normal operating
mode after the elapse of release time from the STOP mode.
2. When using CSIp, UARTq, or the A/D converter in the SNOOZE mode, set up serial standby
control register m (SSCm) and A/D converter mode register 2 (ADM2) before switching to the
STOP mode. For details, see 9.3 Registers Controlling A/D Converter and 11.3 Registers
Controlling Serial Array Unit.
Remark
p = 00; q = 0; m = 0
The operating statuses in the STOP mode are shown below.