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IO Pin

PIN Description#

Pin NameDirectionDescription
BOOTINEnter into boot mode When boot or reset is performed, if this pin is tied low, it will enter into boot mode. Users can do APP/DCT(DCT : Device Configuration Table for WizFi250-Configuration-Data) upload or factory recovery in the boot mode through UART. LOW : Start as boot mode HIGH: Start as application mode
FUNCTIONINPerform pre-defined action Perform pre-defined action at the booting or while running. This can be used when UART cannot be used.(Refer to FUNCTION Pin Usage)
LED1OUTIndicate WiFi Association When WiFi is joined (associated) with router in STA mode or with station in AP mode, it will be changed to low state (LED On). And when left(disassociated), it will be returned to high state (LED Off).♦ LOW (LED ON) : WiFi is Associated ♦ HIGH(LED OFF): WiFi is Not associated
LED2OUTIndicate Data/Command Mode If serial (UART or SPI) interface mode is data mode, this pin will be tied low state (LED On). And if it is command mode, it will be tied high state (LED Off).♦ LOW (LED ON) : Data Mode ♦ HIGH(LED OFF): Command Mode
SPI_DATA_READYOUTIndicates that there is data to send through SPI When WizFi250 has data to send in the SPI mode, this will be changed to high state. This pin can be used for awakening host MCU.
GPIO 1IN/OUTUser Defined GPIO 1 User can utilize this pin for GPIO through AT Command.
GPIO 5IN/OUTUser Defined GPIO 5 User can utilize this pin for GPIO through AT Command.
GPIO 6IN/OUTUser Defined GPIO 6 User can utilize this pin for GPIO through AT Command.
GPIO 7IN/OUTUser Defined GPIO 7 User can utilize this pin for GPIO through AT Command.
GPIO 8IN/OUTUser Defined GPIO 8 User can utilize this pin for GPIO through AT Command.
Reserved-Reserved for future use

FUNCTION Pin Usage#

Through the function pin, users can perform specific actions without AT Command.

ActionHow to enter
Factory RecoveryWhile booting or reset, keep low state (pressing the button) together with BOOT pin over 3.5 seconds
AP ModeDuring running state, tie it to low state and release it for once.Refer to time diagram below.
OTA ModeWhile running state, tie it to low state and release it for twice.Refer to time diagram below.
Factory DefaultDuring running state, tie it to low state and release it for thrice.Refer to time diagram below.

Time sequence graph is as below.

VariableMinTypMax
t1100 ms-200 ms
t2100 ms-200 ms