Molex EVC Adapter

Enhanced Video Connector [EVC]


The Enhanced Video Connector Interface bus [EVC] uses a 35-pin connector defined by the Video Electronic Standards Association [VESA].

The EVC bus combines both analog and digital signaling.
The EVC interface is designed to carry VGA/RGB, FireWire, audio, and USB signals.
The EVC connector is essentially the same as the DVI connector, except it carries different signals.
The EVC bus was released in 1995 and defined by Video Electronic Standards Association (VESA).
The pin out was changed between version 1 and version 2 of the standard to align it with the P & D pinout.
The changes moved signals; Change Power +, and Change Power Return.

A listing of companies that manufacture connectors may be found on the Connector Manufacturers page.
The table below provides the EVC pinout and signal names for the EVC connector.
The graphic allows the location of the different pins on the connector.





EVC Connector shape


EVC Connector Pin Out
Pin # Signal Name Pin # Signal Name Pin # Signal Name
1 Audio output, Right 11 Changing Power + 21 Audio input, Left
2 Audio output, Left 12 Changing Power- 22 Audio input, Right
3 Audio output return 13 Video input, Y or composite in 23 Audio input return
4 Sync return 14 Video input, return 24 Stereo sync (TTL)
5 Horizontal sync (TTL) 15 Video input, C in 25 DDC return
6 Vertical sync (TTL) 16 USB data + 26 DDC data (SDA)
7 Reserved 17 USB data - 27 DDC, clock (SCL)
8 Reserved 18 USB/1394 common mode shield 28 +5 VDC
9 1394 pair A, data - 19 1394 Vg 29 1394 pair B, clock +
10 1394 pair A, data + 20 1394 Vp 30 1394 pair B, clock -
C1 Red Video C2 Green Video C3 Pixel Clock
C4 Blue Video C5 Video/PixelGround - -




Not sure if the EVC interface ever caught on. I assume it was an up-grade to the VGA interface.
Some sites state it is the same as the P&D interface, although the P&D [1997] followed the EVC interface [1995].

Additional Video Interfaces
EGA [Enhanced Graphics Adapter], an obsolete interface from 1984.

VGA [Video Graphics Array]: an out-dated interface from 1987, later upgraded to SVGA.

SVGA [Super VGA] offers more colors and resolutions, but really does not exist as a single standard. The primary standard refers to the BIOS, and how the computer talks to the monitor. VESA Display Data Channel [DDC] is a VESA standard that defines how to read certain pins in a standard SVGA monitor to query the monitor's capabilities.

XGA [Extended Graphics Array]: an obsolete interface from 1990.

FPDI [Flat Panel Display Interface] describes the electrical, logical, and connector interface between flat panel displays and display controllers in an integrated environment.

VMChannel [VESA Media Channel] describes a hardware interface for desktop multimedia systems. The VMChannel is a multiple master, multiple drop, clock synchronous interface designed for concurrent pixel data streams. VMChannel enables the real time flow of uncompressed multimedia pixels in a bidirectional fashion between multiple video adapters.





EVC Connector with VGA and USB ends
EVC to VGA and USB

Use the Buses icon at the bottom of the page to reach the top level index for all bus types.
The Equipment icon at the bottom of the page to reach manufacturers of PC Monitors.
Back to the main PC Video Monitor Bus page, or to the main PC Interface Bus page.


PC motherboard
Home

Distributor rolodex Electronic Components Electronic Equipment EDA CDROM Software Engineering Standards, BOB card Cabled Computer Bus Electronic Engineering Design Table Conversion DB9-to-DB25.
DistributorsComponents Equipment Software Standards Buses Design Reference

Modified 3/05/12
Copyright © 1998 - 2011 All rights reserved Leroy Davis