Pinebook SDIO gpio control using SD card slot blog post
#3
This post is just to document the placement of the pins on my breakout with the extender;  the Sparkfun breakout board ( coming soon ) has a slightly different layout.  

Code:
Pin     SD      SPI

PF5     D2      X
PF4     D3      CS
PF3     CMD     DI
+       VDD     VDD
PF2     CLK     SCLK
PF1     D0      DO
PF0     D1      X
-       VSS     VSS

   

Note:  Vss in the pic above (ground) is normally the third pin up from the bottom, between D0 and CLK.  I moved Vss physically to create two logical groups of three pins PF0-2 and PF3-5;  this also allows for good separation between Vdd and Vss.

Note:  See schematic pp 9;  T-card/USB



marcushh777    Cool

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RE: Pinebook SDIO gpio control using SD card slot blog post - by MarkHaysHarris777 - 07-22-2017, 07:44 AM

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