BLUENRG-332VC datasheet(62/67 Pages) STMICROELECTRONICS

62 / 67 page

Contents

Introduction .......................................................................5

Functional overview ...............................................................6

2.1

System architecture ............................................................ 6

2.2

Arm Cortex-M0+ core with MPU .................................................. 7

2.3

Memories ..................................................................... 7

2.3.1

Embedded flash memory .................................................. 7

2.3.2

Embedded SRAM ........................................................ 7

2.3.3

Embedded ROM ......................................................... 7

2.3.4

Embedded OTP ......................................................... 7

2.3.5

Memory protection unit (MPU) .............................................. 8

2.4

Security and safety ............................................................. 8

2.5

RF subsystem ................................................................. 8

2.5.1

RF front-end block diagram................................................. 8

2.5.2

IPDs for BlueNRG-LPS .................................................... 9

2.6

Power supply management ..................................................... 10

2.6.1

SMPS step-down regulator ................................................ 10

2.6.2

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

2.6.3

Linear voltage regulators.................................................. 11

2.6.4

Power supply supervisor .................................................. 11

2.7

Operating modes.............................................................. 12

2.7.1

RUN mode ............................................................ 12

2.7.2

DEEPSTOP mode....................................................... 12

2.7.3

SHUTDOWN mode ...................................................... 14

2.8

Reset management............................................................ 14

2.9

Clock management ............................................................ 15

2.10

Boot mode ................................................................... 17

2.11

Embedded UART bootloader.................................................... 17

2.12

General purpose inputs/outputs (GPIO) .......................................... 17

2.13

Direct memory access (DMA) ................................................... 17

2.14

Nested vectored interrupt controller (NVIC) ........................................ 18

2.15

Analog digital converter (ADC) .................................................. 18

2.15.1

Temperature sensor ..................................................... 18

2.16

True random number generator (RNG) ........................................... 19

2.17

Timers and watchdog .......................................................... 19

2.17.1

General-purpose timers (TIM2, TIM16, TIM17) ................................. 19

BlueNRG-LPS

Contents

DS13819 - Rev 4

page 62/67

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