Datasheet
78K0/Ix2 CHAPTER 19 STANDBY FUNCTION
R01UH0010EJ0500 Rev.5.00 611
Feb 28, 2012
Figure 19-6. STOP Mode Release by Interrupt Request Generation (1/2)
(1) When high-speed system clock (X1 oscillation) is used as CPU clock
Normal operation
(high-speed
system clock)
Normal operation
(high-speed
system clock)
OscillatesOscillates
STOP
instruction
STOP mode
Wait
(set by OSTS)
Standby release signal
Oscillation stabilization wait
(HALT mode status)
Oscillation stopped
High-speed
system clock
(X1 oscillation)
Status of CPU
Oscillation stabilization time (set by OSTS)
Interrupt
request
(2) When high-speed system clock (external clock input) is used as CPU clock
Interrupt
request
STOP
instruction
Standby release signal
Status of CPU
High-speed
system clock
(external clock input)
Normal operation
(high-speed
system clock)
Oscillates
STOP mode
Oscillation stopped
Wait
Note
Normal operation
(high-speed
system clock)
Oscillates
Note The wait time is as follows:
• When vectored interrupt servicing is carried out: 17 or 18 clocks
• When vectored interrupt servicing is not carried out: 11 or 12 clocks
Remark The broken lines indicate the case when the interrupt request that has released the standby mode is
acknowledged.