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oskirby / logicbone

Logicbone ECP5 Development Board
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P8 eMMC pinouts are incorrect #4

Open oskirby opened 4 years ago

oskirby commented 4 years ago

It seems that there is an discrepancy in the Beaglebone Black reference manual, and the schematic. The SRM states that P8 pins 11 through 21 are used for the eMMC and shouldn't be used by the capes when the eMMC is in use, but the Beaglebone schematics show P8 pins 3-6 and 20-25 are used by the eMMC.

Unfortunately, the Logicbone was laid out according to the reference manual, which means that we won't be compatible with capes that make use of P8 pins 11-21 such as the CRAMPS board or 24-bit LCD displays.

oskirby commented 4 years ago

For the record, I was working with the BBB_SRM revision A5.2 dated April 11th, 2013, which was hosted on Adafruit's website.