Chapter 2: Programming Considerations; Gpio - Digi Connect SP Hardware Reference Manual

Programming
Considerations
C
This chapter discusses programming consideration for the Digi Connect SP and Digi
Connect Wi-SP and the NS7520 processor it is based on.

GPIO

General Information
The NS7520 processor supports 16 general purpose I/O (GPIO) pins, some of which are
reserved for specific functions and some of which can be customized. These pins fall into
three categories:
H A P T E R
Those labeled "Reserved" in the following table are dedicated to a specific use
and must not be reprogrammed, or the unit may not operate correctly. Often,
these pins are not connected to external interfaces.
Those labeled "Allocated" in the following table are exposed to an external
interface and allocated to a specific use by the software but can be customized
safely with code modifications.
Those labeled "Available" are exposed to an external interface, not controlled
directly by the software, and can be customized.
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