Vendor: CAST Category: GPIO

General-Purpose I/O Controller Core

The GPIO core is used to create functions in a system that are not implemented with dedicated controllers, and require simple inp…

Overview

The GPIO 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 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 core is rigorously verified, silicon-proven and available in RTL source or as a targeted FPGA netlist.

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 in-puts 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 AHB interface (contact CAST for other interfaces)
  • Extremely configurable (implementation of registers, external clock inverted versus negative edge flip-flops etc.)

Block Diagram

GPIO block diagram

Applications

  • The GPIO core can be used in a wide range of applications where simple I/O control is needed.

What’s Included?

  • Synthesizable RTL or FPGA netlist
  • Testbench & sample test cases
  • Simulation & synthesis scripts
  • Documentation

Specifications

Identity

Part Number
GPIO
Vendor
CAST
Type
Silicon IP

Files

Product Sheet Download

Note: some files may require an NDA depending on provider policy.

Provider

CAST
HQ: USA

Learn more about GPIO IP core

Moving to AMBA® 5? Your AMBA® 4 IP Can Still Come With You

As SoC architectures adopt AMBA® 5 fabrics and components, many proven IP blocks still rely on AMBA® 4 or earlier interfaces. That creates a common integration problem: how do designers connect newer AMBA® 5 system components to existing IP without redesigning the IP or replacing verified blocks?

Frequently asked questions about GPIO IP cores

What is General-Purpose I/O Controller Core?

General-Purpose I/O Controller Core is a GPIO IP core from CAST listed on Semi IP Hub.

How should engineers evaluate this GPIO?

Engineers should review the overview, key features, supported foundries and nodes, maturity, deliverables, and provider information before shortlisting this GPIO IP.

Can this semiconductor IP be compared with similar products?

Yes. Buyers can compare this product with similar semiconductor IP cores or IP families based on category, provider, process options, and structured technical specifications.

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