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Using a second SDIO on PiZero

cto over 9 years ago

Is the SDIO lines supporting the SD card on the raspberry PiZero the same as the ones on P1?

Is there a way to use those SDIO on P1 to support WiFi?

0 clem57 over 9 years ago

These appear to be the same as the Micro SD on Pi2 not the regular sized P1 SD card.

Clem
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0 cto over 9 years ago in reply to clem57

I know, my question is about the SDIO bus. The processor supports 2 SDIO devices; one is the microSD for booting, however P1 has SDIP available at GPIO22-27 (15,16,18,22,37,13).
My question is are the SDIO lines on P1 is related to the second SDIO device or are they the same ones connected to the micro SD?
Thanks
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0 Robert Peter Oakes over 9 years ago

The SD cards are primaraly a SPI device, as such you technically could parallel anouther device as long as you use a seperate chip select line ut this would then require special driver to know what to use for it. It seems much simpler to use a USB Hub of sorts or an ESP8266 board on the serial lines, depending on what your trying to acheive
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