STM32L431XX datasheet(5/200 Pages) STMICROELECTRONICS

Part #	STM32L431XX

Description	RTC with HW calendar, alarms and calibration

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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5 / 200 page

DocID028800 Rev 1

5/200

STM32L431xx

Contents

6

6.1.1

Minimum and maximum values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.1.2

Typical values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.1.3

Typical curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.1.4

Loading capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.1.5

Pin input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

6.1.6

Power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6.1.7

Current consumption measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

6.2

Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

6.3

Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

6.3.1

General operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

6.3.2

Operating conditions at power-up / power-down . . . . . . . . . . . . . . . . . . 83

6.3.3

Embedded reset and power control block characteristics . . . . . . . . . . . 83

6.3.4

Embedded voltage reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

6.3.5

Supply current characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

6.3.6

Wakeup time from low-power modes and voltage scaling

transition times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

6.3.7

External clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 108

6.3.8

Internal clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 113

6.3.9

PLL characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

6.3.10

Flash memory characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

6.3.11

EMC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

6.3.12

Electrical sensitivity characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

6.3.13

I/O current injection characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

6.3.14

I/O port characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

6.3.15

NRST pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

6.3.16

Analog switches booster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

6.3.17

Analog-to-Digital converter characteristics . . . . . . . . . . . . . . . . . . . . . 132

6.3.18

Digital-to-Analog converter characteristics . . . . . . . . . . . . . . . . . . . . . 145

6.3.19

Voltage reference buffer characteristics . . . . . . . . . . . . . . . . . . . . . . . . 149

6.3.20

Comparator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

6.3.21

Operational amplifiers characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 152

6.3.22

Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

6.3.23

VBAT monitoring characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

6.3.24

Timer characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

6.3.25

Communication interfaces characteristics . . . . . . . . . . . . . . . . . . . . . . 157

7

Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

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