AN4080 datasheet(14/35 Pages) STMICROELECTRONICS

tên linh kiện	AN4080

Giải thích chi tiết về linh kiện	This application note is intended for system designers

PDF	35 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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14 / 35 page

Power supplies and reset sources of the STM32F0xx family

AN4080

14/35

DocID023035 Rev 4

1.2.4

Programmable voltage detector (PVD) of the STM32F0x1/x2

devices

You can use the PVD to monitor the VDD power supply by comparing it to a threshold

selected by the PLS[2:0] bits in the Power control register (PWR_CR).

The PVD is enabled by setting the PVDE bit.

When enabled, the typical current consumption of this feature is 0.15 μA.

A PVDO flag is available, in the Power control/status register (PWR_CSR), to indicate if VDD

is higher or lower than the PVD threshold.

•

This event is internally connected to the EXTI line16 and can generate an interrupt if

enabled through the EXTI registers.

•

The PVD output interrupt can be generated when VDD drops below the PVD threshold

and/or when VDD rises above the PVD threshold depending on EXTI line16

rising/falling edge configuration. As an example the service routine could perform

emergency shutdown tasks.

Figure 6. PVD thresholds

Caution:

In the STM32F0x8 devices the input voltage must be fixed at 1.8 V, therefore the

programmable voltage detector is not available.

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