UM1975

Component descriptions

DocID028608 Rev 1

13/20

3

Component descriptions

This section describes the devices included on the X-NUCLEO-IDW01M1 expansion

board.

check whether resistor R21 is present on the X-NUCLEO-IDW01M1 board; if it is,

please remove it as it may interfere with JTAG debug.

3.1

SPWF01SA module

The SPWF01SA module is FCC (FCC ID: VRA-SG9011203), IC (IC: 7420A-SG9011203)

and CE certified. The SPWF01SA contains a low power Wi-Fi b/g/n transceiver SoC - a

highly integrated Wi-Fi system dedicated to the WLAN management and compliant with Wi-

Fi network specifications. The interface of the device to the STM32 Nucleo boards is via a

UART interface and some GPIO pins. The SPWF01SA module also integrates an SMD

antenna and has an embedded 38.4 MHz oscillator for the embedded Wi-Fi radio.

Table 8: SPWF01SA details

Feature

Description

Sales type

SPWF01SA.11

Package

SMD 30 pin

Operating voltage

Typ. 3.3 V

3.2

User push-buttons and LED

To command certain I/O signals and signal SPWF01SA module status information, the X-

NUCLEO-IDW01M1 expansion board has two push-buttons and four LEDs.

The hardware and firmware functions associated with the push-buttons and LEDs are

shown in the following table:

Table 9: Push-buttons and LED functions

Feature

Description

RESET (hardware, by the user)

Push the SW1 push-button on the board

GPIO7_ADC1 module signal (hardware &

firmware dependent, by the user)

Push the SW2 push-button on the board

3.3 V board power supply on

LED 1 (green) lit

GPIO10 mod. signal (firmware dependent)

LED 2 (blue) lit

GPIO14 mod. signal (firmware dependent)

LED 3 (red) lit

GPIO13 mod. signal (firmware dependent)

LED 4 (yellow) lit