RL78/G1H CHAPTER 20 STANDBY FUNCTION
R01UH0575EJ0120 Rev. 1.20 Page 743 of 920
Dec 22, 2016
20.3.3 SNOOZE mode
(1) SNOOZE mode setting and operating statuses
The SNOOZE mode can only be specified for the A/D converter, or DTC. Note that this mode can only be
specified if the CPU clock is the high-speed on-chip oscillator clock.
When using the A/D converter in the SNOOZE mode, set up A/D converter mode register 2 (ADM2) before
switching to the STOP mode. For details, see 13.3 Registers Controlling A/D Converter.
When DTC transfer is used in SNOOZE mode, before switching to the STOP mode, allow DTC activation by
interrupt to be used. During STOP mode, detecting DTC activation by interrupt enables DTC transit to
SNOOZE mode, automatically. For details, see 16.3 Registers Controlling DTC.
In SNOOZE mode transition, wait status to be only following time.
Transition time from STOP mode to SNOOZE mode: 18 to 65 μs
Remark Transition time from STOP mode to SNOOZE mode varies depending on the temperature
conditions and the STOP mode period.
Transition time from SNOOZE mode to normal operation:
• When vectored interrupt servicing is carried out:
HS (High-speed main) mode: “4.99 μs to 9.44 μs” + 7 clocks
LS (Low-speed main) mode: “1.10 μs to 5.08 μs” + 7 clocks
• When vectored interrupt servicing is not carried out:
HS (High-speed main) mode: “4.99 μs to 9.44 μs” + 1 clock
LS (Low-speed main) mode: “1.10 μs to 5.08 μs” + 1 clock
The operating statuses in the SNOOZE mode are shown next.
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