STM32F415RG datasheet(24/186 Pages) STMICROELECTRONICS

24 / 186 page

Description

STM32F415xx, STM32F417xx

24/186

DocID022063 Rev 4

2.2.15

Power supply supervisor

Internal reset ON

On packages embedding the PDR_ON pin, the power supply supervisor is enabled by

holding PDR_ON high. On all other packages, the power supply supervisor is always

enabled.

The device has an integrated power-on reset (POR) / power-down reset (PDR) circuitry

coupled with a Brownout reset (BOR) circuitry. At power-on, POR/PDR is always active and

ensures proper operation starting from 1.8 V. After the 1.8 V POR threshold level is

reached, the option byte loading process starts, either to confirm or modify default BOR

threshold levels, or to disable BOR permanently. Three BOR thresholds are available

through option bytes. The device remains in reset mode when VDD is below a specified

threshold, VPOR/PDR or VBOR, without the need for an external reset circuit.

The device also features an embedded programmable voltage detector (PVD) that monitors

the VDD/VDDA power supply and compares it to the VPVD threshold. An interrupt can be

generated when VDD/VDDA drops below the VPVD threshold and/or when VDD/VDDA is

higher than the VPVD threshold. The interrupt service routine can then generate a warning

message and/or put the MCU into a safe state. The PVD is enabled by software.

Internal reset OFF

This feature is available only on packages featuring the PDR_ON pin. The internal power-on

reset (POR) / power-down reset (PDR) circuitry is disabled with the PDR_ON pin.

An external power supply supervisor should monitor VDD and should maintain the device in

reset mode as long as VDD is below a specified threshold. PDR_ON should be connected to

this external power supply supervisor. Refer to Figure 7: Power supply supervisor

interconnection with internal reset OFF.

Figure 7. Power supply supervisor interconnection with internal reset OFF

1. PDR = 1.7 V for reduce temperature range; PDR = 1.8 V for all temperature range.

MS31383V3

NRST

VDD

PDR_ON

External VDD power supply supervisor

Ext. reset controller active when

VDD < 1.7 V or 1.8 V

(1)

VDD

Application reset

signal (optional)

STM32F415RG 数据表(PDF) 24 Page - STMicroelectronics

STM32F415RG 数据表(HTML) 24 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载