MC68HC05K0 Datasheet, PDF (63/154 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Low-Power Modes
Data-Retention Mode
STOP
STOP
YES
DISABLED?
NO
CLEAR I BIT IN CCR
SET IRQE BIT IN ISCR
CLEAR TOF, RTIF, TOIE, AND RTIE BITS IN TSCR
TURN OFF INTERNAL OSCILLATOR
HALT
CLEAR I BIT IN CCR
SET IRQE BIT IN ISCR
TURN OFF CPU CLOCK
TIMER CLOCK ACTIVE
WAIT
CLEAR I BIT IN CCR
SET IRQE BIT IN ISCR
TURN OFF CPU CLOCK
TIMER CLOCK ACTIVE
EXTERNAL
YES
RESET?
NO
NO
LVR
ENABLED?
YES
YES
LVR?
NO
EXTERNAL
YES
INTERRUPT?
NO
TURN ON INTERNAL OSCILLATOR
START STABILIZATION DELAY
YES
EXTERNAL
RESET?
NO
YES
EXTERNAL
RESET?
NO
LVR
NO
ENABLED?
LVR
NO
ENABLED?
YES
YES
LVR?
YES
YES
LVR?
NO
YES
EXTERNAL
INTERRUPT?
NO
NO
YES
EXTERNAL
INTERRUPT?
NO
YES
TIMER
INTERRUPT?
NO
YES
TIMER
INTERRUPT?
NO
END OF
YES
STABILIZATION
DELAY?
NO
YES
COP
YES
RESET?
NO
TURN ON CPU CLOCK
1. LOAD PC WITH RESET VECTOR
OR
2. SERVICE INTERRUPT
a. SAVE CPU REGISTERS ON STACK
b. SET I BIT IN CCR
c. LOAD PC WITH INTERRUPT VECTOR
Figure 6-1. Stop/Wait/Halt Flowchart
COP
RESET?
NO
MC68HC05K0 • MC68HC05K1 — Rev. 2.0
Low-Power Modes
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Technical Data