UM2071 datasheet(9/56 Pages) STMICROELECTRONICS

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UM2071

Hardware description

DocID029370 Rev 3

9/56

Table 1: STEVAL-IDB007V1 board component descriptions

Region

Description

BlueNRG-1 system on chip

Micro USB connector for power supply and I/O

JTAG connector

RESET button

two USER buttons

LPS25HB MEMS pressure sensor with embedded temperature

LSM6DS3 3D digital accelerometer and 3D digital gyroscope

PWR LED

three user LEDs

back of the

PCB

battery holder for two AAA batteries

J, L

Two rows of Arduino-compliant connectors

Integrated balun with matching network and harmonics filter

STM32L151CBU6 48-pin microcontroller (USB to serial bridge for I/O channel to

PC communication)(1)

ST2378E level translator to adapt voltage level between STM32 and BlueNRG-1

Notes:

(1)STM32 is not intended to be programmed by users

2.2

BlueNRG-1 SoC connections

The BlueNRG-1 very low power Bluetooth low energy (BLE) single-mode system on chip

(Figure 2: "STEVAL-IDB007V1 board components"

– region A) has 160 KB of Flash, 24 KB

of RAM, a 32-bit core ARM cortex-M0 processor and several peripherals (ADC, GPIOs,

I²C, SPI, Timers, UART, WDG and RTC).

The microcontroller is connected to various components such as buttons, LEDs and

sensors. The following table describes the microcontroller pin functions.

Table 2: BlueNRG-1 pin description with board functions

Pin name

Board function

LED

Micro

Button

Pressure

sensor

accelerometer

and

gyroscope

JTAG

Arduino connectors

CN1

CN2

CN3

CN4

DIO10

JTMS-

SWTDIO

DIO9

JTCK-

SWTCK

DIO8

TXD

(PA2)

pin 1

IO8

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