Power supplies

AN2586

8/28

Doc ID 13675 Rev 7

Figure 2.

Power supply scheme

1.

1 µF) must be connected.

2.

3.

1.3

Reset and power supply supervisor

1.3.1

Power on reset (POR) / power down reset (PDR)

The device has an integrated POR/PDR circuitry that allows proper operation starting from

2V.

power on/power down reset threshold, refer to the electrical characteristics in the low-

density, medium-density, high-density, XL-density, and connectivity line STM32F10xxx

datasheets.

Figure 3.

Power on reset/power down reset waveform

STM32F10xxx

N × 100 nF

+ 1 × 10 µF

100 nF + 1 µF

100 nF + 1 µF

(note 1)

Battery

ai14865b

POR

PDR

40 mV

hysteresis

Temporization

RESET

ai14364