IP Catalog > Peripheral IP > Input/Output Controller IP > General-Purpose I/O Controller with APB Interface

General-Purpose I/O Controller with APB Interface

Overview

The GPIO-APB core is used to create functions in a system that are not implemented with dedicated controllers, and require simple input and/or output software-controlled signals.

The number of general-purpose I/O signals is user selectable ranging from 1 to 32. For more I/O signals, several GPIO-APB cores can be used in parallel. Each GPIO signal can be programmed individually as an input, an input in interrupt mode, an output, a bi-directional I/O, or as driven by an auxiliary input. GPIO signals programmed as inputs can be registered at the rising edge of the system clock or at a user-programmed edge of the external clock. 

The GPIO-APB core is rigorously verified, silicon-proven and available in RTL source or as a targeted FPGA netlist. It can be used in a wide range of applications where simple I/O control is needed.

Key Features

  • User selectable number of GPIO signals from 1 to 32
  • All GPIO signals can be bi-directional (external bi-directional I/O cells are required in that case)
  • All GPIO signals can be tri-stated or open-drain enabled (external tri-state or open-drain I/O cells are required in that case)
  • GPIO signals programmed as inputs can cause an interrupt request to the CPU
  • All GPIO signals are programmed as inputs at hardware reset
  • Auxiliary inputs to the GPIO core bypass outputs from RGPIO_OUT register
  • Alternative input reference clock signal from external interface
  • 32-bit APB interface (contact CAST for other interfaces)
  • Extremely configurable (implementation of registers, external clock inverted versus negative edge flip-flops etc.)
  • Deliverables
    • Synthesizable RTL or FPGA netlist
    • Testbench & sample test cases
    • Simulation & synthesis scripts
    • Documentation 
       

Block Diagram

General-Purpose I/O Controller with APB Interface Block Diagram

Technical Specifications

Request Info

Related IPs

×
Semiconductor IP