Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)

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By rudy
#67573
urbanze wrote:
martinayotte wrote:You can not use the SPI on the left side, it is in-use by the flash.
You have to use the HSPI on the right side.



what SDIO means? i can use GP9 & 10 normaly after boot?

You can't use the SPI - Serial Peripheral Interface because it is used by the Flash. You can configure the board to use less pins but you can not use the SPI functions because it is used for the flash.