MC68HC05V12 Datasheet, PDF (78/246 Pages) Freescale Semiconductor, Inc – HCMOS Microcontreller Unit

Freescale Semiconductor, Inc.
Low-Power Modes
STOP
STOP
N
ENABLED?
Y
STOP EXTERNAL OSCILLATOR,
STOP INTERNAL TIMER CLOCK,
AND RESET STARTUP DELAY
STOP INTERNAL PROCESSOR
CLOCK,
CLEAR I BIT IN CCR
RESET CHIP
WAIT
EXTERNAL OSCILLATOR ACTIVE
AND INTERNAL
TIMER CLOCK ACTIVE
STOP INTERNAL PROCESSOR
CLOCK,
CLEAR I BIT IN CCR
EXTERNAL
Y
RESET?
N
IRQ
EXTERNAL
Y
INTERRRUPT?
N
RXP RISING Y
EDGE?
N
PORT C FALLING ^Y
EDGE?
N
Technical Data
RESTART EXTERNAL OSCILLATOR,
AND STABILIZATION DELAY
END
OF STARTUP
Y
DELAY
N
RESTART
INTERNAL PROCESSOR CLOCK
1. FETCH RESET VECTOR
OR
2. SERVICE INTERRUPT
A. STACK
B. SET I BIT
C. VECTOR TO INTERRUPT ROUTINE
Figure 6-2. Stop/Wait Flowcharts
Y
EXTERNAL
RESET?
N
IRQ
Y
EXTERNAL
INTERRUPT?
N
TIMER
Y
INTERNAL
INTERRUPT?
N
Y
RXP RISING
EDGE?
N
Y
PORT C
FALLING
EDGE?
N
GAUGE
Y
SEQUENCE
INTERRUPT?
N
Y
SPI
INTERRUPT?
N
Low-Power Modes
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MC68HC05V12 — Rev. 2.0