參數(shù)資料
型號: MC68HC05C8A
廠商: Motorola, Inc.
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 52/158頁
文件大?。?/td> 773K
代理商: MC68HC05C8A
Low-Power Modes
Technical Data
MC68HC05C8A
MC68HCL05C8A
MC68HSC05C8A
Rev. 5.0
52
Low-Power Modes
MOTOROLA
Figure 6-1. Stop/Wait Mode Flowchart
6.3 Stop Mode
The STOP instruction places the microcontroller unit (MCU) in its lowest-
power consumption mode. In stop mode, the internal oscillator is turned
off, halting all internal processing, including timer operation.
During stop mode, the TCR bits are altered to remove any pending timer
interrupt request and to disable any further timer interrupts. The timer
prescaler is cleared. The I bit in the condition code register is cleared to
enable external interrupts. All other registers and memory remain
1. FETCH RESET VECTOR
OR
2. SERVICE INTERRUPT
A. STACK
B. SET I BIT
C. VECTOR TO
INTERRUPT
ROUTINE
1. FETCH RESET VECTOR
OR
2. SERVICE INTERRUPT
A. STACK
B. SET I BIT
C. VECTOR TO
INTERRUPT
ROUTINE
Y
STOP
OSCILLATOR ACTIVE
TIMER CLOCK ACTIVE
PROCESSOR CLOCKS STOPPED
CLEAR I BIT
(IRQ)
EXTERNAL
INTERRUPT
RESET
RESET
TURN ON OSCILLATOR
WAIT FOR TIME
DELAY TO STABILIZE
RESTART
PROCESSOR CLOCK
WAIT
STOP OSCILLATOR
AND ALL CLOCKS
CLEAR I BIT
INTERRUPT
TIMER
INTERRUPT
(IRQ)
EXTERNAL
Y
Y
Y
Y
N
N
N
N
N
INTERRUPT
SCI
Y
N
INTERRUPT
SPI
N
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