參數(shù)資料
型號: ST7FLITE19F1B6
廠商: 意法半導體
英文描述: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, 4 TIMERS, SPI
中文描述: 8位單電壓閃存存儲器,數(shù)據(jù)EEPROM,模數(shù)轉換器,4定時器,微控制器的SPI
文件頁數(shù): 39/131頁
文件大小: 2046K
代理商: ST7FLITE19F1B6
ST7LITE1
39/131
POWER SAVING MODES
(Cont’d)
9.3 WAIT MODE
WAIT mode places the MCU in a low power con-
sumption mode by stopping the CPU.
This power saving mode is selected by calling the
‘WFI’ instruction.
All peripherals remain active. During WAIT mode,
the I bit of the CC register is cleared, to enable all
interrupts. All other registers and memory remain
unchanged. The MCU remains in WAIT mode until
an interrupt or RESET occurs, whereupon the Pro-
gram Counter branches to the starting address of
the interrupt or Reset service routine.
The MCU will remain in WAIT mode until a Reset
or an Interrupt occurs, causing it to wake up.
Refer to
Figure 22
.
Figure 22. WAIT Mode Flow-chart
Note:
1.
Before servicing an interrupt, the CC register is
pushed on the stack. The I bit of the CC register is
set during the interrupt routine and cleared when
the CC register is popped.
WFI
INSTRUCTION
RESET
INTERRUPT
Y
N
N
Y
CPU
I BIT
OSCILLATOR
PERIPHERALS
ON
ON
OFF
0
FETCH RESET VECTOR
OR SERVICE INTERRUPT
CPU
I BIT
OSCILLATOR
PERIPHERALS
ON
OFF
ON
0
CPU
I BIT
OSCILLATOR
PERIPHERALS
ON
ON
ON
X
1)
CYCLE DELAY
256 OR 4096 CPU CLOCK
1
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