MC68HC705V12CFN MOTOROLA [Motorola, Inc], MC68HC705V12CFN Datasheet - Page 78

• Manufacturer Part Number: MC68HC705V12CFN
• Description: The Motorola microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

Low-Power Modes
Advance Information
78
STOP INTERNAL TIMER CLOCK,
STOP EXTERNAL OSCILLATOR,
STOP INTERNAL PROCESSOR
AND RESET STARTUP DELAY
CLEAR I BIT IN CCR
PORT C FALLING
INTERRRUPT?
RXP RISING
ENABLED?
EXTERNAL
EXTERNAL
N
N
CLOCK,
RESET?
EDGE?
EDGE?
STOP
STOP
Y
IRQ
N
N
Y
Y
Y
Y
N
RESTART EXTERNAL OSCILLATOR
Figure 6-2. Stop/Wait Flowcharts
AND STABILIZATION DELAY
OF STARTUP
N
DELAY
END
1.
2.
Low-Power Modes
INTERNAL PROCESSOR CLOCK
FETCH RESET VECTOR
OR
SERVICE INTERRUPT
A. STACK
B. SET I BIT
C. VECTOR TO INTERRUPT ROUTINE
Y
RESTART
RESET CHIP
EXTERNAL OSCILLATOR ACTIVE
STOP INTERNAL PROCESSOR
Y
Y
Y
MC68HC705V12
Y
Y
Y
Y
TIMER CLOCK ACTIVE
CLEAR I BIT IN CCR
AND INTERNAL
INTERRUPT?
INTERRUPT?
INTERRUPT?
SEQUENCE
INTERRUPT?
RXP RISING
EXTERNAL
EXTERNAL
FALLING
INTERNAL
PORT C
CLOCK,
EDGE?
GAUGE
RESET?
EDGE?
WAIT
TIMER
SPI
IRQ
N
N
N
N
N
N
N
MOTOROLA
—
Rev. 3.0