BLUENRG-345MT datasheet(27/72 Pages) STMICROELECTRONICS

27 / 72 page

Pin number

Pin name

(function

after reset)

type

I/O

structure

Alternate functions

Additional functions

QFN48

QFN32

WLCSP49

VSSIO

Ground I/O

VSSIO

Ground I/O

VSSIFADC

Ground analog RF

VSSSX

Ground analog RF

VSSRFTRX

Ground analog RF

VSSRF

Ground analog RF

Exposed

pad

Exposed

pad

GND

Ground

1. This pin is not 5 V tolerant.

Table 4. Legend/abbreviations used in the pinout table

Name

Abbreviation

Definition

Pin name

Unless otherwise specified in brackets below, the pin name and the pin function during

and after reset are the same as the actual pin name

Pin type

Supply pin

Input only pin

I/O

Input / output pin

I/O structure

5 V tolerant I/O

3.6 V tolerant I/O

RF I/O

RST

Bidirectional reset pin with weak pull-up resistor

Options for TT or FT I/Os

_f(1).

I/O, Fm+ capable

_a(2).

I/O, with analog switch function supplied by IO

BOOSTER(3)

Notes

Unless otherwise specified by a note, all I/Os are set as analog inputs during and after

reset

Pin functions

Alternate functions Functions selected through GPIOx_AFR registers

Additional functions Functions directly selected/enabled through peripheral registers

1. The related I/O structures in Table 3. Pin description are: FT_f

2. The related I/O structures in Table 3. Pin description are: FT_a

3. IO BOOSTER block allows the good behavior of those switches to be guaranteed when the VBAT goes below 2.7 V. Refer

to the BlueNRG-LP reference Manual (RM0479) for more details.

Table 5. Alternate function port A

Port

AF0

AF1

AF2

AF3

AF4

AF5

AF6

AF7

I2C1/I2C2/

SYS_AF

LPUART/ USART

SPI1/SPI2/

SYS_AF/

USART/I2S2

SPI1/

SPI2/RTC

USART/

TIM/ I2S2

SPI2/ SPI3

LPUART/

I2S2/ I2S3

TIM1

SYS_AF

Port

PA0

I2C1_SCL

USART_CTS

SPI2_MCK/

I2S2_MCK

TIM1_CH3

BlueNRG-LP

Pinouts and pin description

DS13282 - Rev 2

page 27/72

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