參數(shù)資料
型號: ST7PL05Y0MB
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO16
封裝: 0.150 INCH, PLASTIC, SOP-16
文件頁數(shù): 35/108頁
文件大?。?/td> 2098K
代理商: ST7PL05Y0MB
ST7L0
32/108
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 18.
Figure 18. WAIT Mode Flowchart
Notes:
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
Y
CPU
OSCILLATOR
PERIPHERALS
IBIT
ON
0
OFF
FETCH RESET VECTOR
OR SERVICE INTERRUPT
CPU
OSCILLATOR
PERIPHERALS
IBIT
ON
OFF
0
ON
CPU
OSCILLATOR
PERIPHERALS
IBIT
ON
X 1)
ON
256 CPU CLOCK CYCLE
DELAY
1
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