ST72334J2TASLASHXXX datasheet(37/150 Pages) STMICROELECTRONICS

부품명	ST72334J2TA/XXX

상세설명	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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제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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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

CPU

OSCILLATOR

PERIPHERALS

IBIT

OFF

FETCH RESET VECTOR

OR SERVICE INTERRUPT

CPU

OSCILLATOR

PERIPHERALS

IBIT

OFF

CPU

OSCILLATOR

PERIPHERALS

IBIT

X 1)

4096 CPU CLOCK CYCLE

DELAY

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