2 edid 1.3 specification (vesa), 3 displayid, Specification (vesa) – Kontron KTLX800-pITX User Manual

Page 10: Ktlx800/pitx software guide, 1 displayid, Parameter summary

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KTD-S0023-A Page

7

Graphics

Interface


KTLX800/pITX Software Guide

3.2

EDID 1.3 Specification (VESA)

The EDID (Extended Display Identification Data) record has a fixed structure. The first 8 bytes contain the
distinctive identification 00h, FFh, FFh, FFh, FFh, FFh, FFh, 00h. The end of the record is marked by the
checksum (1 byte). The result of the addition of all bytes including the checksum has to be zero.
For a comprehensive support of the majority of available panels you don't need all fields of the EDID
record. The

Detailed Timing Descriptor (18 bytes) is the most important field. No 24bit panels (FPDI/LDI)

are supported though. This means EDID should only be used for 18bit panels.
For further information please consult the official EDID specification from the VESA comitee which has to be
payed.

3.3

DisplayID

TM

Specification (VESA)

Intended as a replacement for all previous EDID versions DisplayID

TM

contains many new features. It's a

structure with several well defined elements (tags). Not every element that is listed in the specification has
to be part of the resulting data set (basic section).
KONTRON has decided to use this selection of tags (mandatory presence).

Tag

Description

00h

Product Identification Data Block (Vendor ID, Product Code, Manufacturing Date ...)

03h

Type I Detailed Timing Data Block (Pixel Clock, Horizontal/Vertical Data ...)

0Ch

Display Device Data Block (Device Technology, Operating Mode, Color Depth ...)

0Dh

Interface Power Sequencing Data Block (Power On/Off Timing)

0Fh

Display Interface Data Block (Interface Type, Interface Attribute ...)

3.3.1 DisplayID

TM

Parameter Summary

Only a part of the parameters used in the DisplayID

TM

Windows

®

tool are interpreted by a specific board. The

following table shows a summary of the used parameters (

valid for KTLX800/pITX

).

Group

Parameter

Comment

Type I Timing

Pixel Clock

Type I Timing

Horizontal Active

Type I Timing

Horizontal Blank

Type I Timing

Horizontal Sync Offset

Front porch

Type I Timing

Horizontal Sync Width

Type I Timing

Vertical Active

Type I Timing

Vertical Blank

Type I Timing

Vertical Sync Offset

Front porch

Type I Timing

Vertical Sync Width

Display Interface 1

Bits per Pixel

Color depth (18 or 24bit)

Display Interface 1

24 Bit Color Mapping

Display Interface 2

Signal Polarity

Only H-Sync and V-Sync

Display Interface 2

DE Mode

Only Normal mode + Fixed mode low

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