AN3271 datasheet(8/29 Pages) STMICROELECTRONICS

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AN3271 数据表(PDF) 8 Page - STMicroelectronics

部件名	AN3271

功能描述	This application note provides

PDF	29 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

8 / 29 page

Pin descriptions and typical application hookup

AN3271

8/29

Doc ID 17933 Rev 2

Figure 4.

Typical application hookup

VCCLO - output signal is asserted if the battery voltage is insufficient, an LED indicates low

battery voltage.

INT - interrupt output indicates either low battery voltage or a press of the PB button during

operation. After asserting an interrupt, the processor should prepare the system for power-

down.

PBOUT - output is asserted if the PB button is pressed. The primary cause of INT assertion

can be easily derived from this signal.

The relationship among VCCLO, INT and PBOUT is clear from the simplified block diagram in

Figure 5.

Simplified relationship among VCCLO, INT and PBOUT

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