Chapter 3: Programming Considerations; Gpio - Digi Connect EM Hardware Reference Manual

Programming
Considerations
C
This chapter addresses the embedded modules programming considerations.
Note

GPIO

General Information
The NS7520 processor supports 16 general purpose I/O (GPIO) lines, some of which are
reserved for specific functions and some of which can be customized. These GPIO lines
fall into three categories:
H A P T E R
This chapter applies only to development kit customers.
Those labeled "Reserved" in the following table are reserved for a specific use
and must not be reprogrammed, or the unit may not operate correctly. Often,
these lines 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 they 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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