MC68HC705C Motorola, MC68HC705C Datasheet - Page 70

• Manufacturer Part Number: MC68HC705C
• Description: HCMOS Microcontroller Unit
• Manufacturer: Motorola

Low-Power Modes
Technical Data
70
NOTE:
If the clock monitor is enabled (CME = 1), the STOP instruction causes
the clock monitor to time out and reset the MCU.
1. LOAD PC WITH RESET VECTOR
2. SERVICE INTERRUPT:
a. SAVE CPU REGISTERS ON STACK
b. SET I BIT IN CCR
c. LOAD PC WITH INTERRUPT VECTOR
TURN OFF INTERNAL OSCILLATOR
RESUME COP WATCHDOG COUNT
TURN ON INTERNAL OSCILLATOR
TURN ON INTERNAL CLOCK
NO
SUSPEND COP COUNTER
Figure 6-2. Programmable COP Watchdog
CLEAR I BIT IN CCR
STABILIZATION
INTERRUPT?
EXTERNAL
EXTERNAL
in Stop Mode (PCOPE = 1) Flowchart
Low-Power Modes
OR
RESET?
END OF
DELAY?
STOP
NO
NO
YES
YES
YES
1. LOAD PC WITH RESET VECTOR
2. SERVICE INTERRUPT:
a. SAVE CPU REGISTERS ON STACK
b. SET I BIT IN CCR
c. LOAD PC WITH INTERRUPT VECTOR
TURN ON INTERNAL OSCILLATOR
CLEAR PCOPE BIT IN COPCR
TURN ON INTERNAL CLOCK
CLEAR COP COUNTER
MC68HC705C8A — Rev. 2.0
STABILIZATION
END OF
DELAY?
OR
NO
YES
MOTOROLA