Active Standard

IEEE 2977-2021

IEEE Standard for Adoption of MIPI Alliance Specification for A-PHY Interface (A-PHY) Version 1.0

This standard adopts MIPI Alliance--MIPI A-PHY Specification Version 1.0 as an IEEE Standard. The adopted standard provides an asymmetric data link in a point-to-point or daisy-chain topology, with high-speed unidirectional data, embedded bidirectional control data and optional power delivery over a single cable. In this way, it reduces wiring, cost and weight, as high-speed data, control data and optional power share the same physical wiring. For integration with existing network backbones, it complements Ethernet, Controller Area Network (CAN), FlexRay, and other interfaces.

Sponsor Committee
BOG/CAG - Corporate Advisory Group
Active Standard
PAR Approval
Board Approval

Working Group Details

IEEE SA Board of Governors
Sponsor Committee
BOG/CAG - Corporate Advisory Group
Working Group
MIPI_A-PHY - MIPI A-PHY Adoption Working Group
Learn More
IEEE Program Manager
Soo Kim
Working Group Chair
Richard Wietfeldt


Adoption of the MIPI A-PHY Specification Version 1.1

This A-PHY Specification document specifies the implementation of the A-PHY, including its layering, electrical characteristics, and optional features. Different protocols employing A-PHY technology can have different constraints, which can require the use of different approaches for operation control. Therefore, while this document provides the features to enable stable, optimized Link configuration, it does not mandate specific configurations for specific channels.

Learn More

No Active Standards
No Superseded Standards
No Inactive-Withdrawn Standards
No Inactive-Reserved Standards

Sign up for our monthly newsletter to learn about new developments, including resources, insights and more.