Contents

1 Introduction ............................................................................................................................................ 1

1.1 Overview ............................................................................................................................................... 1

1.2 Key features.......................................................................................................................................... 1

2 Ordering information ............................................................................................................................. 3

2.1 Ordering table ....................................................................................................................................... 3

2.2 Marking information .............................................................................................................................. 4

3 Functional description ........................................................................................................................... 6

3.1 Block diagram ....................................................................................................................................... 6

3.2 Core introduction .................................................................................................................................. 7

3.3 Bus introduction .................................................................................................................................... 7

3.4 Memory map ......................................................................................................................................... 7

3.5 Flash ..................................................................................................................................................... 8

3.6 SRAM ................................................................................................................................................... 9

3.7 NVIC ..................................................................................................................................................... 9

3.8 EXTI ...................................................................................................................................................... 9

3.9 Clock and boot ...................................................................................................................................... 9

3.10 Boot modes......................................................................................................................................... 10

3.11 Power supply schemes ....................................................................................................................... 10

3.12 Power supply supervisors ................................................................................................................... 10

3.13 Voltage regulator ................................................................................................................................ 10

3.14 Low power mode ................................................................................................................................ 10

3.15 Timers and watchdogs ....................................................................................................................... 11

3.16 GPIO ................................................................................................................................................... 12

3.17 UART .................................................................................................................................................. 13

3.18 I2C ...................................................................................................................................................... 13

3.19 SPI ...................................................................................................................................................... 13

3.20 I2S ...................................................................................................................................................... 13

3.21 ADC .................................................................................................................................................... 13

3.22 CRC .................................................................................................................................................... 14

3.23 SWD ................................................................................................................................................... 14

4 Pinout and assignment ........................................................................................................................ 15

4.1 Pinout diagram ................................................................................................................................... 15

4.2 Pin assignment ................................................................................................................................... 17

4.3 Pin multiplexing .................................................................................................................................. 18

5 Electrical characteristics ..................................................................................................................... 20

5.1 Test condition ..................................................................................................................................... 20

5.1.1 Load capacitor ........................................................................................................................ 20

5.1.2 Pin input voltage ..................................................................................................................... 20

5.1.3 Power scheme ........................................................................................................................ 20

5.1.4 Current consumption measurement ....................................................................................... 21

5.2 Absolute maximum rating ................................................................................................................... 21

5.3 Operating conditions ........................................................................................................................... 22

5.3.1 General operating conditions .................................................................................................. 22

5.3.2 Operating conditions at power-up/power-down ...................................................................... 23

5.3.3 Embedded reset and power control block characteristics ...................................................... 24

5.3.4 Built-in voltage reference ........................................................................................................ 24