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README: changed "uSD" to "8:10 card"

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Werner Almesberger 2011-01-17 12:45:42 -03:00
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@ -2,12 +2,12 @@ Ben Blinkenlights
=================
This project is a proof of concept implementation of Rikard Lindstrom's
idea of using the Ben's uSD slot as a general extension interface also
for devices that don't speak MMC or SD/SDIO. The application is a simple
LED circuit, as suggested by David Samblas.
idea of using the Ben's 8:10 card slot as a general extension interface
also for devices that don't speak MMC or SD/SDIO. The application is a
simple LED circuit, as suggested by David Samblas.
The uSD slot gives access to six GPIOs, a 3.3 V supply that can be
switched on and off by software, and ground. We use a simple form of
The 8:10 card slot gives access to six GPIOs, a 3.3 V supply that can
be switched on and off by software, and ground. We use a simple form of
multiplexing to drive ten LEDs with this interface.
Note that one should only light one LED at a time. If multiple LEDs are