The GP I/O IP core is user-programmable general-purpose I/O controller. Its use is to implement functions that are not implemented with the dedicated controllers in a system and require simple input and/or output software controlled signals.

Key Features:

• From 1 to 32 user selectable I/Os
• All I/Os can be bi-directional, tri-state or open-drain
• I/Os can interrupt the CPU
• WISHBONE compliant
• Alternative input reference clock from external signal
• Inputs can be registered at raising edge of system clock
• Inputs can be registered at user programmed edge of external clock

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