upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 351

• Manufacturer Part Number: upd78f0124hgba1-8et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

High-speed system clock
Standby release signal
(a) Release by unmasked interrupt request
Internal oscillation clock
Standby release signal
When an unmasked interrupt request is generated, the STOP mode is released.
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.
Remarks 1. The broken lines indicate the case when the interrupt request that has released the standby
Status of CPU
Status of CPU
2. f
mode is acknowledged.
R
Figure 18-6. STOP Mode Release by Interrupt Request Generation
: Internal oscillation clock oscillation frequency
Operating mode
system clock)
(1) When high-speed system clock is used as CPU clock
(High-speed
(2) When internal oscillation clock is used as CPU clock
(Internal oscillation
Operating mode
Oscillates
clock)
instruction
STOP
instruction
CHAPTER 18 STANDBY FUNCTION
STOP
Oscillation stopped
User’s Manual U16962EJ3V0UD
STOP mode
STOP mode
Interrupt
request
Interrupt
request
Oscillation stabilization time (set by OSTS)
Oscillates
Oscillation stabilization
Operation
stopped
(17/f
(set by OSTS)
wait status
R
Oscillates
)
Wait
(Internal oscillation clock)
Operating mode
(High-speed system clock)
Operating mode
After the oscillation
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