Renesas RL78/G1P Hardware User Manual page 619

16-bit single-chip microcontroller

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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

Controlling Serial Array Unit.

Remark p = 00; q = 0; m = 0

The operating statuses in the STOP mode are shown below.

R01UH0895EJ0100 Rev.1.00

Nov 29, 2019

For details, see 9.3 Registers Controlling A/D Converter and 11.3 Registers

CHAPTER 16 STANDBY FUNCTION