MC68HC705C8ACS

Manufacturer Part NumberMC68HC705C8ACS
ManufacturerFreescale Semiconductor, Inc
MC68HC705C8ACS datasheet
 


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Page 70/222:

Low-Power Modes

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Freescale Semiconductor, Inc.

Low-Power Modes

STOP OSCILLATOR
AND ALL CLOCKS
CLEAR I BIT
NO
RESET
EXTERNAL
INTERRUPT
(IRQ)
NO
YES
TURN ON OSCILLATOR
WAIT FOR TIME
DELAY TO STABILIZE
1. FETCH RESET VECTOR
2. SERVICE INTERRUPT:
a. STACK
b. SET I BIT
c. VECTOR TO
INTERRUPT ROUTINE
Figure 6-1. Stop/Wait Mode Function Flowchart
During stop mode, the I bit in the condition code register (CCR) is
cleared to enable external interrupts. All other registers and memory
remain unaltered. All input/output (I/O) lines remain unchanged. The
processor can be brought out of stop mode only by an external interrupt
or reset.
Technical Data
70
STOP
WAIT
OSCILLATOR ACTIVE
TIMER, SCI, AND SPI
CLOCKS ACTIVE
CPU CLOCKS STOPPED
CLEAR I BIT
RESET
YES
YES
RESTART CPU CLOCK
1. FETCH RESET VECTOR
OR
OR
2. SERVICE INTERRUPT:
a. STACK
b. SET I BIT
c. VECTOR TO
INTERRUPT ROUTINE

Low-Power Modes

For More Information On This Product,
Go to: www.freescale.com
NO
EXTERNAL
NO
INTERRUPT
(IRQ)
YES
INTERNAL TIMER
INTERRUPT
YES
NO
YES
INTERNAL SCI
INTERRUPT
NO
NO
YES
INTERNAL SPI
INTERRUPT
MC68HC705C8A — Rev. 3