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products:wizfi250:wizfi250pg:io_pin


I/O PIN



PIN Description


Pin Name Direction Description
BOOT IN Enter 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
FUNCTION IN Perform 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)
LED1 OUT Indicate 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
LED2 OUT Indicate 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_
READY
OUT Indicates 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 1 IN/OUT User Defined GPIO 1

User can utilize this pin for GPIO through AT Command.
GPIO 5 IN/OUT User Defined GPIO 5

User can utilize this pin for GPIO through AT Command.
GPIO 6 IN/OUT User Defined GPIO 6

User can utilize this pin for GPIO through AT Command.
GPIO 7 IN/OUT User Defined GPIO 7

User can utilize this pin for GPIO through AT Command.
GPIO 8 IN/OUT User Defined GPIO 8

User can utilize this pin for GPIO through AT Command.
Reserved - Reserved for future use


2013/09/04 13:11 · jeonggw


FUNCTION Pin Usage


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

Action How to enter
Factory Recovery While booting or reset, keep low state (pressing the button) together with BOOT pin over 3.5 seconds
AP Mode During running state, tie it to low state and release it for once.
Refer to time diagram below.
OTA Mode While running state, tie it to low state and release it for twice.
Refer to time diagram below.
Factory Default During running state, tie it to low state and release it for thrice.
Refer to time diagram below.


Time sequence graph is as below.


Variable Min Typ Max
t1 100 ms - 200 ms
t2 100 ms - 200 ms


2013/09/04 13:12 · jeonggw


products/wizfi250/wizfi250pg/io_pin.txt · Last modified: 2015/03/16 10:33 (external edit)