Renesas RL78 Series User Manual page 720

RL78/G1D
19.3.3 SNOOZE mode
(1) SNOOZE mode setting and operating statuses
The SNOOZE mode can only be specified for CSI00, UART0, or the A/D converter. Note that this mode can only be
specified if the CPU clock is the high-speed on-chip oscillator clock.
When using CSI00 or UART0 in the SNOOZE mode, set the SWCm bit of the serial standby control register m
(SSCm) to 1 immediately before switching to the STOP mode. For details, see 13.3 Registers Controlling Serial
Array Unit.
When using the A/D converter in the SNOOZE mode, set the AWC bit of the A/D converter mode register 2 (ADM2) to
1 immediately before switching to the STOP mode. For details, see 12.3 Registers Used in A/D Converter.
In SNOOZE mode transition, wait status to be only following time.
Transition time from STOP mode to SNOOZE mode: 18 µs 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 :
LS (Low-speed main) mode :
LV (Low-voltage main) mode :
● When vectored interrupt servicing is not carried out:
HS (High-speed main) mode :
LS (Low-speed main) mode :
LV (Low-voltage main) mode :
The operating statuses in the SNOOZE mode are shown below.
R01UH0515EJ0120 Rev.1.20
Dec 16, 2016
"4.99 µs to 9.44 µs" + 7 clocks
"1.10 µs to 5.08 µs" + 7 clocks
"16.58 µs to 25.40 µs" + 7 clocks
"4.99 µs to 9.44 µs" + 1 clock
"1.10 µs to 5.08 µs" + 1 clock
"16.58 µs to 25.40 µs" + 1 clock
CHAPTER 19 STANDBY FUNCTION
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