BLUENRG-332VC datasheet(25/67 Pages) STMICROELECTRONICS

25 / 67 page

Table 4. Pin descriptions

Pin number

Pin name

(function

after reset)

Pin type

I/O

structure

Alternate functions

Additional functions

QFN32

WLCSP36

PB3

I/O

FT_a

USART_CTS, LPUART_TX,

SPI3_SCK, TIM2_CH4, TIM17_CH1,

ANTENNA_ID[3], I2S3_SCK

ADC_VINP0, wakeup

PB2

I/O

FT_a

USART_RTS_DE, TIM2_CH3,

TIM16_BK, ANTENNA_ID[2]

ADC_VINM0, wakeup

PB1

I/O

FT_a

USART_CK, TIM2_ETR, TIM16_CH1N,

ANTENNA_ID[1]

ADC_VINP1, wakeup

PB0

I/O

FT_a

USART_RX, LPUART_RTS_DE,

TIM16_CH1, ANTENNA_ID[0]

ADC_VINM1, wakeup

PA3

I/O

FT_a

SWCLK, USART_RTS_DE, SPI3_SCK,

TIM2_CH2, TIM16_CH1N, I2S3_SCK

ADC_VINP2, wakeup

PA2

I/O

FT_a

SWDIO, USART_CK, SPI3_MCK,

TIM2_CH1, TIM16_CH1, I2S3_MCK

ADC_VINM2, wakeup

PA1

I/O

FT_f

I2C1_SDA, IR_OUT, USART_TX,

TIM2_CH4

Wakeup

PA0

I/O

FT_f

I2C1_SCL, USART_CTS, IR_OUT,

TIM2_CH3

Wakeup

PA8

I/O

USART_RX, RX_SEQUENCE,

SPI3_MISO, TIM2_CH3, TIM16BK,

I2S3_MISO

Wakeup, RTC_OUT

PA9

I/O

USART_TX, RTC_OUT, SPI3_NSS,

TIM2_CH4, TIM17_CH1, I2S3_WS

Wakeup

PA10

I/O

LPUART_CTS, TX_SEQUENCE,

SPI3_MCK, TIM17_CH1N, I2S3_MCK

Wakeup, LCO

PA11

I/O

MCO, RX_SEQUENCE, SPI3_MOSI,

TIM17_BK, I2S3_SD

Wakeup

VDD2

1.7-3.6 battery voltage

input

RF1

I/O

RF input/output.

Impedance 50 Ω

VDDRF

1.7-3.6 battery voltage

input

OSCOUT

I/O

FT_a

32 MHz crystal

OSCIN

I/O

FT_a

32 MHz crystal

PB15

I/O

FT_a

USART_RX

Wakeup

PB14

I/O

FT_a

TX_SEQUENCE, I2C1_SDA,

TIM2_ETR, MCO, USART_RX

PVD_IN, Wakeup

PB13

I/O

FT_a

TIM2_CH4

SXTAL1, Wakeup

PB12

I/O

FT_a

LPUART_CTS, LCO, TIM2_CH3

SXTAL0, Wakeup

PB7

I/O

FT_f

USART_CTS, I2C1_SDA, LPUART_RX,

TIM2_CH2, RF_ACTIVITY

Wakeup

PB6

I/O

FT_f

I2C1_SCL, LPUART_TX, TIM2_CH1,

TIM17_CH1, ANTENNA_ID[6]

Wakeup

VDDSD

1.7-3.6 battery voltage

input

VLXSD

SMPS input/output

VSSSD

SMPS Ground

BlueNRG-LPS

Pinouts and pin description

DS13819 - Rev 4

page 25/67

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