SPWF04SA datasheet(13/27 Pages) STMICROELECTRONICS

13 / 27 page

SPWF04SA, SPWF04SC

Pinout description

DocID029757 Rev 5

13/27

Signal

name

n°

Main Function (1)

Alternate function

Electrical

notes

System

function (2)

Peripheral

driver (3)

MicroPython

Interfaces (4)

GPIO[17]

General Purpose

input/output

GPIO[18]

General Purpose

input/output

Notes:

(1)Main Function is set at the module initialization when "factory" configuration is used. The GPIOs are all set as

input pull down with the exception of GPIO7 that is set as input pull up.

(2)Alternate System Functions are activated when the related pin is connected or when the command/specific

configuration is used.

(3)Alternate Peripheral Drivers are activated when the corresponding peripheral command is used.

(4)Alternate MicroPython Functions are activated when the related class is initialized.

(5)To perform the restore of the factory variable set, the pin GPIO0 must be high during powerup.

(6)This alternate function is running when low power mode variable is enabled. Ext. RC is suggested in order to

stabilize the signal. The value is high to wakeup the module.

(7)To enable the STA or MiniAP switch, the GPIO[7] needs to be low together with the HW reset. GPIO7 is set by

default as input pull up. To enable the STA or MiniAP switch, the GPIO[7] needs to be low at reset. WPS push

button function will be enables if this pin is set to low during active phase.

(8)When this GPIO is high at the startup the module enters the MicroPython mode.

(9)To select the SPI as host interface, this GPIO must be driven high at the reset time.

(10)Selected by using the configuration variable Blink_led.

Note: Use an external pull up/pull down connected to a given GPIO to prevent unwanted

behavior.

SPWF04SA Datasheet(PDF) 13 Page - STMicroelectronics