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ST72334J2TA/XXX датащи(PDF) 37 Page - STMicroelectronics

номер детали ST72334J2TA/XXX
подробное описание детали  8-bit MCU for automotive with single voltage Flash/ROM memory, ADC, 16-bit timers, SPI, SCI interfaces
PDF  150 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72334J2TA/XXX датащи(HTML) 37 Page - STMicroelectronics

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POWER SAVING MODES (Cont’d)
10.3 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 20.
Figure 20. Wait Mode Flowchart
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
OSCILLATOR
PERIPHERALS
IBIT
ON
ON
0
OFF
FETCH RESET VECTOR
OR SERVICE INTERRUPT
CPU
OSCILLATOR
PERIPHERALS
IBIT
ON
OFF
0
ON
CPU
OSCILLATOR
PERIPHERALS
IBIT
ON
ON
X 1)
ON
4096 CPU CLOCK CYCLE
DELAY



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