MC68HC05P9ACDW FREESCALE [Freescale Semiconductor, Inc], MC68HC05P9ACDW Datasheet - Page 64

• Manufacturer Part Number: MC68HC05P9ACDW
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Low-Power Modes
64
Freescale Semiconductor, Inc.
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Figure 26. WAIT Instruction Flowchart
Low-Power Modes
Figure 27. STOP/WAIT Clock Logic
OSCILLATOR
INTERNAL
STOP
WAIT
(1) FETCH RESET VECTOR
(2) SERVICE INTERRUPT
a. SAVE CPU REGISTERS ON STACK
b. SET I BIT IN CCR
c. VECTOR TO INTERRUPT SERVICE ROUTINE
OR
RESTART CPU CLOCK
CLEAR I BIT IN CCR
STOP CPU CLOCK
2
2
RESET?
WAIT
INTERNAL CLOCK
YES
YES
YES
OTHER ON-CHIP
INTERRUPT?
INTERRUPT?
EXTERNAL
INTERRUPT
SOURCES?
NO
TIMER
NO
NO
NO
TIMER CLOCK
CPU CLOCK
ADC CLOCK
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