RL78/G10 CHAPTER 16 STANDBY FUNCTION
R01UH0384EJ0311 Rev. 3.11 530
Dec 22, 2016
(2) STOP mode release
The STOP mode can be released by the following two sources.
(a) STOP mode release by unmasked interrupt request
When an unmasked interrupt request is generated, the STOP mode is released. After the oscillation stabilization
time has elapsed, if interrupt acknowledgment is enabled, vectored interrupt servicing is carried out. If interrupt
acknowledgment is disabled, the next address instruction is executed.
Figure 16-3. STOP Mode Release by Interrupt Request Generation (1/2)
(1) When high-speed on-chip oscillator clock is used as CPU clock
Standby release signal
Note 1
Status of CPU
High-speed on-chip
oscillator clock
Normal operation
(high-speed
on-chip
oscillator clock)
Normal operation
(high-speed on-chip
oscillator clock)
Oscillates
STOP mode
Oscillation stopped
Wait for oscillation
accuracy stabilization
Interrupt
request
STOP
instruction
Oscillates
Wait
Supply of the
clock is stopped
STOP mode release time
Note 2
Notes 1. For details of the standby release signal, see Figure 14-1 Basic Configuration of Interrupt Function.
2. STOP mode release time: Supply of the clock is stopped: 27 μs (typ.)
Wait
• When vectored interrupt servicing is carried out: 11 clocks
• When vectored interrupt servicing is not carried out: 3 clocks
Remarks 1. The clock supply stop time varies depending on the temperature conditions and STOP mode period.
2. The broken lines indicate the case when the interrupt request that has released the standby mode is
acknowledged.
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