AN3271 datasheet(17/29 Pages) STMICROELECTRONICS

Numer części	AN3271

Szczegółowy opis	This application note provides

PDF	29 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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17 / 29 page

AN3271Automatic confirmation of power-up + immediate shutdown after PB button press or und-

Doc ID 17933 Rev 2

17/29

Automatic confirmation of power-up + immediate

shutdown after PB button press or undervoltage

In addition to automatic power-up confirmation, power can be disabled immediately after a

PB button press or undervoltage detection. In this way the application does not service the

interrupt, which decreases its complexity. However as there is no time for data backup and

since the application no longer controls power-down, this solution might be considered as

less secure in some cases.

If INT is connected to the PSHOLD signal, the power for the application is disabled

immediately after pressing the PB button or undervoltage detection (see Figure 15).

Figure 15.

Automatic power-up confirmation + shutdown after PB button press or

undervoltage

AN3271 Arkusz danych(PDF) 17 Page - STMicroelectronics