RL78/F13, F14 CHAPTER 23 STANDBY FUNCTION
R01UH0368EJ0210 Rev.2.10 1536
Dec 10, 2015
23.3.3 SNOOZE mode
(1) SNOOZE mode setting and operating statuses
The SNOOZE mode can only be specified for the A/D converter, LIN/UART module, 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 entering the
STOP mode. For details, see 12.3 Registers Used in A/D Converter.
When using the UART function of the LIN/UART module in the SNOOZE mode, set up the LUSCn register before
entering the STOP mode.
When DTC transfer is used in SNOOZE mode, before entering 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 19.2 Registers.
In SNOOZE mode transition, wait status to be only following time.
Transition time from STOP mode to SNOOZE mode
When FRQSEL4 = 1 in the user option byte (000C2H/010C2H): 18 s to 105 s
When FRQSEL4 = 0 in the user option byte (000C2H/010C2H): 18 s to 65 s
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: "4.99 s to 9.44 s" + 7 clocks
When vectored interrupt servicing is not carried out: "4.99 s to 9.44 s" + 1 clock
The operating statuses in the SNOOZE mode are shown below.
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