upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 345

• Manufacturer Part Number: upd78f0114hgb-8es-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(2) STOP mode release
High-speed system clock
Internal oscillation clock
High-speed system clock
is selected as CPU clock
when STOP instruction
is executed
Internal oscillation clock
is selected as CPU clock
when STOP instruction
is executed
High-speed system clock
Standby release signal
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.
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.
Status of CPU
Figure 17-6. STOP Mode Release by Interrupt Request Generation (1/2)
STOP mode
STOP mode release
Operating mode
Figure 17-5. Operation Timing When STOP Mode Is Released
system clock)
(1) When high-speed system clock is used as CPU clock
(High-speed
Oscillates
Operation stopped
(oscillation stabilization time set by OSTS)
instruction
STOP
(17/f
CHAPTER 17 STANDBY FUNCTION
R
)
Oscillation stopped
HALT status
User’s Manual U16961EJ4V0UD
STOP mode
Internal oscillation
Interrupt
request
clock
Oscillation stabilization time (set by OSTS)
Clock switched
by software
Oscillation stabilization
(set by OSTS)
wait status
Oscillates
High-speed system clock
High-speed system clock
Wait
(High-speed system clock)
Operating mode
After the oscillation
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