SDHC or SDIO on MK20DX256VLH7, possible?

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sumotoy

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Maybe I'm wrong but read somewhere that it's possible support SDHC or SDIO 2.0 with this chip.
I'm only curious... :p
 
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If your question is whether SDFat can be used to write to a SDHC card over SPI, the answer is yes. But I perhaps the SDHC you are referring to is not the SDHC I am referring to?
 
All you need to do is to connect the additional pins and write some software... The chip cant do this in hardware, but a softwareemulation is possible.
The initialization of the card is a bit more complex (needs spi too)
I played a bit with this some time ago and was able to access the card this way. The transferrate was ok, higher than with spi, but it was not worth to develop a whole new sd lib.
 
Thanks, I was curious, apart the SD many MMC, WiFi adapters and cameras use SDIO 2 interface, but MK20DX256VLH7 support only version 1 if I understand correctly?
 
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