---
title: IO Design Architecture (IODA) Specification
group: hardwarearchitecture
publicreview: false
tsth: false
tags:
  - specification
  - hardware
  - reference
  - pcie
  - phb
  - ioda
  - power8
  - power9
date: 2016-03-15
draft: false
---

The purpose of the OpenPOWER I/O Design Architecture (IODA) specification is to describe the chip architecture for key aspects of
PCIe® based host bridge (PHB) designs for IBM® POWER systems.