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

Doc ID 17933 Rev 2

17/29

9

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.

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