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BeagleBoardPinMux

By Tiffany Butler,2015-02-14 10:20
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This page is about Pin Multiplex (PinMux) on the BeagleBoard. The OMAP3 chip has fewer balls (pins) than the internal logic which provides functionality. So each ball (pin) of the OMAP3 can have different functionality (e.g. GPIO or I2C.TX). This is controlled by internal OMAP3 registers. This page tries to give some details of where some information about OMAP3 pin mux can be found in hardware and how this is controlled by software, mainly by U-Boot and the Linux kernel. The information on this page can be used then e.g. to re-configure pins exposed on Beagle's expansion connector.
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