Kontron KTA55-pITX Manuel d'utilisateur télécharger pdf (Page 9)

KTD-S0043-A Page 6 Graphics Interface

KTA55/pITX Software Guide

Example 2:

SHARP LQ190E1LW01 (double pixel clock)

Data sheet specifications (no definition of Sync Offset and Sync Width):

Clock Frequency [typ.] 54 MHz

Horizontal Period (1) [typ.] 844 Clocks (equivalent to Horizontal Total)

Horizontal Display Period 640 Clocks (equivalent to Horizontal Active)

Vertical Period [typ.] 1066 Lines (equivalent to Vertical Total)

Vertical Display Period 1024 Lines (equivalent to Vertical Active)

Result:

Pixel Clock 108 (2 x 54 MHz)

Horizontal Active 1280 (2 x 640 Clocks)

Horizontal Blank 408 ((844 – 640) x 2 Clocks)

Horizontal Sync Offset 45 (normally approx. 10 – 15 % of Horizontal Blank)

Horizontal Sync Width 140 (normally approx. 30 – 70 % of Horizontal Blank)

Vertical Active 1024

Vertical Blank 42 (1066 – 1024 Lines)

Vertical Sync Offset 1 (normally approx. 1 – 3 Lines)

Vertical Sync Width 3 (normally approx. 1 – 15 Lines)

Example 3:

LG-PHILIPS LM170E01-TLA1 (double pixel clock)

Data sheet specifications:

Clock Frequency [typ.] 54 MHz

Hsync Period [typ.] 844 Clocks

Horiz. Valid [typ.] 640 Clocks

Horiz. Back Porch [typ.] 124 Clocks

Horiz. Front Porch [typ.] 24 Clocks

Vsync Period [typ.] 1066 Lines

Vert. Valid [typ.] 1024 Lines

Vert. Back Porch [typ.] 38 Lines

Vert. Front Porch [typ.] 1 Line

Result:

Pixel Clock 108 (2 x 54 MHz)

Horizontal Active 1280 (2 x 640 Clocks → Horizontal Addr. Time)

Horizontal Blank 408 ((844 – 640) x 2 Clocks)

Horizontal Sync Offset 48 (2 x 24 Clocks → Horizontal Front Porch)

Horizontal Sync Width 112 (((408/2 – 124 – 24) x 2) → H. Blank – H. Back Porch – H.

Front Porch)

Vertical Active 1024 (Vertical Addr. Time)

Vertical Blank 42 (1066 – 1024 Lines)

Vertical Sync Offset 1 (Vertical Front Porch)

Vertical Sync Width 3 (Vertical Blank – Vertical Back Porch – Vertical Front Porch)

The following picture shows the typical video timing.

Blanking

Active Part

Blanking

Front

Porch

Sync

Pulse

Width

Back

Porch

Front

Porch

Sync

Pulse

Width

Back

Porch

pos.

Sync

neg.

Sync

H-/V-Sync

pos.

Sync

neg.

Sync

Timing Parameter Definitions

Address Time

H-/V-Video

Total

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 24 25

Commentaires sur ces manuels

Pas de commentaire

Kontron KTA55-pITX Manuel d'utilisateur Page 9

Commentaires sur ces manuels

Produits connexes et manuels pour Matériel Kontron KTA55-pITX