AN4467 datasheet(13/33 Pages) STMICROELECTRONICS

Part #	AN4467

Description	Getting started with STM32L0xx hardware development

PDF	33 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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13 / 33 page

DocID026156 Rev 2

13/33

AN4467

Power supplies

Figure 4. Power supply supervisors

1. The PVD is available on all STM32L devices and it is enabled or disabled by software.

2. The BOR is available only on devices operating from 1.8 to 3.6 V, and unless disabled by option byte it

masks the POR/PDR threshold.

3. When the BOR is disabled by option byte, the reset is asserted when VDD goes below PDR level.

4. For devices operating from 1.65 to 3.6 V, there is no BOR and the reset is released when VDD goes above

POR level and asserted when VDD goes below PDR level.

DD /VDDA

PVD output

100 mV

hysteresis

PVD

BOR

hyster esis

100 mV

IT enabled

BOR reset

(NRST)

POR/PDR reset

(NRST)

PVD

BOR always active

POR/PDR (BOR not available)

ai17211b

POR

PDR

BOR/PDR reset

(NRST)

BOR disabled by option byte

(Note 1)

(Note 2)

(Note 3)

(Note 4)

AN4467 Datasheet(PDF) 13 Page - STMicroelectronics