Some of eSOM335x pin can be used as GPIO, these pins are specified in pinmux and Hardware Manual document. If you are using eDVK335x, some of GPIOs are accessible through a 2×24 pin header as shown in the following figure:
In addtition, The eSOM335x has 8 channels for analog to digital conversion with 12bit resolution and 200KS/s conversion speed. These pins are also accessible in eDVK335x through 2×24 pin header. Following Video shows how to use these pins for Input-Output and ADC applications.