Timing parameter definitions, Ktlx800/pitx software guide, Example 2 – Kontron KTLX800-pITX User Manual

Page 8: Example 3

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5

Graphics

Interface


KTLX800/pITX Software Guide

Example 2

(

not useable on KTLX800/pITX

)

:

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

(

not useable on KTLX800/pITX

)

:

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

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