STM32WL33CB datasheet(85/91 Pages) STMICROELECTRONICS

85 / 91 page

Contents

Introduction .......................................................................4

1.1

Glossary ...................................................................... 5

Description ........................................................................6

Functional overview ...............................................................7

3.1

Architecture ................................................................... 7

3.2

Arm Cortex-M0+ core with MPU .................................................. 8

3.3

Memories ..................................................................... 9

3.3.1

Embedded flash memory .................................................. 9

3.3.2

Embedded SRAM ........................................................ 9

3.3.3

Embedded OTP ......................................................... 9

3.3.4

Memory protection unit (MPU) .............................................. 9

3.4

RF subsystem ................................................................. 9

3.4.1

RF front-end ........................................................... 10

3.4.2

TX and RX event alert.................................................... 10

3.4.3

Low power autonomous wake up receiver (LPAWUR) ........................... 10

3.5

Power supply management ..................................................... 12

3.5.1

SMPS step-down converter................................................ 12

3.5.2

SMPS bypass on-the-fly (BOF) ............................................. 13

3.5.3

Linear voltage regulators.................................................. 14

3.5.4

Power voltage supervisor ................................................. 14

3.6

Operating modes.............................................................. 14

3.6.1

Run mode ............................................................. 14

3.6.2

Deepstop mode......................................................... 15

3.6.3

Shutdown mode ........................................................ 16

3.7

Reset management............................................................ 17

3.8

Clock management ............................................................ 18

3.8.1

System clock details ..................................................... 20

3.9

Boot mode ................................................................... 20

3.10

General purpose inputs/outputs (GPIO) ........................................... 21

3.11

Direct memory access (DMA) ................................................... 21

3.12

Nested vectored interrupt controller (NVIC) ........................................ 21

3.13

Advanced encryption standard hardware accelerator (AES) .......................... 22

3.14

True random number generator (RNG) ........................................... 22

3.15

Cyclic redundancy check (CRC) ................................................. 22

3.16

General purpose timers ........................................................ 23

STM32WL33xx

Contents

DS14221 - Rev 5

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