Renesas RL78 Series User Manual page 717

RL78/G1D
(2) STOP mode release
The STOP mode can be released by the following two sources.
(a) 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 19-3. STOP Mode Release by Interrupt Request Generation (1/2)
(a) When high-speed on-chip oscillator clock is used as CPU clock
Standby release signal
Status of CPU
High-speed on-chip
oscillator clock
Notes 1. For details of the standby release signal, see Figure 18-1.
2. STOP mode release time
Supply of the clock is stopped: 18 µs to 65 µs
Wait
● When vectored interrupt servicing is carried out: 7 clocks
● When vectored interrupt servicing is not carried out: 1 clock
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.
R01UH0515EJ0120 Rev.1.20
Dec 16, 2016
STOP
instruction
Note 1
Normal operation
(high-speed on-chip
oscillator clock)
Oscillates
CHAPTER 19 STANDBY FUNCTION
Interrupt
request
STOP mode release time
Supply of the
STOP mode
clock is stopped
Oscillation stopped
Wait for oscillation
accuracy stabilization
Note 2
Normal operation
(high-speed on-chip
Wait oscillator clock)
Oscillates
696