MC68HC05P4A Datasheet, PDF (30/72 Pages) Advanced Analogic Technologies – Microcontrollers

Low-Power Modes
STOP
WAIT
STOP
TO HALT
MASK
N
STOP EXTERNAL OSCILLATOR
STOP INTERNAL TIMER CLOCK
RESET STARTUP DELAY
STOP INTERNAL PROCESSOR
CLOCK
CLEAR I-BIT IN CCR
EXTERNAL OSCILLATOR
ACTIVE AND
INTERNAL TIMER
CLOCK ACTIVE
STOP INTERNAL
PROCESSOR CLOCK,
CLEAR I-BIT IN CCR
EXTERNAL ^Y
RESET?
N
IRQ
EXTERNAL
INTERRUPT?
N
Y
RESTART EXTERNAL
OSCILLATOR, RESTART
STABILIZATION DELAY
END OF
Y
STABILIZATION
DELAY?
RESTART INTERNAL
PROCESSOR CLOCK
Y EXTERNAL
RESET?
N
IRQ
Y _EXTERNAL
INTERRUPT?
N
TIMER
Y
INTERNAL
INTERRUPT?
N
COP
Y
INTERNAL
RESET?
N
1. FETCH RESET VECTOR
OR
2. SERVICE INTERRUPT
a. STACK
b. SET I BIT
c. VECTOR TO INTERRUPT ROUTINE
Figure 6-1. STOP/WAIT Flowchart
MC68HC05P4A Data Sheet, Rev. 7.1
30
Freescale Semiconductor