NEC 78K0S/KB1+ User Manual page 243

(a) Release by unmasked interrupt request
When an unmasked interrupt request (8-bit timer H1
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.
Note Only when sets count clock to f
Figure 14-5. STOP Mode Release by Interrupt Request Generation
(1) If CPU clock is high-speed internal oscillation clock or external input clock
Standby release
signal
Operation
mode
CPU status
Oscillation
System clock
oscillation
(2) If CPU clock is crystal/ceramic oscillation clock
Standby release
signal
Operation
CPU status
mode
Oscillation
System clock
Note The operation stop time is 17
Remark The broken lines indicate the case when the interrupt request that has released the standby mode is
acknowledged.
CHAPTER 14 STANDBY FUNCTION
7
/2
RL
Interrupt
request
STOP
instruction
STOP mode
Oscillation stops.
Interrupt
request
STOP
instruction
STOP mode
Oscillation stops.
μ μ
s (MIN.), 34 s (TYP.), and 67
User's Manual U17446EJ3V1UD
Note
, low-voltage detector, external interrupt request) is
Operation
Operation mode
Note
stops .
Oscillation
Operation
Waiting for stabilization
Note
stops .
of oscillation
(HALT mode status)
Oscillation
Oscillation stabilization time
(set by OSTS)
μ
s (MAX.).
Operation
mode
243