MC68HC705J1A

Manufacturer Part NumberMC68HC705J1A
ManufacturerMotorola
MC68HC705J1A datasheet
 


Specifications of MC68HC705J1A

CaseDIP-20L  
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Page 86/162

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Low-Power Modes
STOP
SWAIT
BIT SET?
NO
CLEAR I BIT IN CCR
SET IRQE BIT IN ISCR
CLEAR TOF, RTIF, TOIE, AND RTIE BITS IN TSCR
TURN OFF INTERNAL OSCILLATOR
YES
EXTERNAL
RESET?
NO
YES
EXTERNAL
INTERRUPT?
NO
TURN ON INTERNAL OSCILLATOR
RESET STABILIZATION TIMER
END OF
STABILIZATION
DELAY?
NO
Technical Data
86
YES
HALT
CLEAR I BIT IN CCR
SET IRQE BIT IN ISCR
TURN OFF CPU CLOCK
TIMER CLOCK ACTIVE
YES
EXTERNAL
RESET?
NO
YES
EXTERNAL
INTERRUPT?
NO
YES
TIMER
INTERRUPT?
NO
YES
COP
RESET?
YES
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 5-2. Stop/Halt/Wait Flowchart
Low-Power Modes
WAIT
CLEAR I BIT IN CCR
SET IRQE BIT IN ISCR
TURN OFF CPU CLOCK
TIMER CLOCK ACTIVE
YES
EXTERNAL
RESET?
NO
YES
EXTERNAL
INTERRUPT?
NO
YES
TIMER
INTERRUPT?
NO
YES
COP
RESET?
NO
MC68HC705J1A — Rev. 4.0
MOTOROLA