Timing parameter definitions, Ktlx800/pitx software guide, Example 2 – Kontron KTLX800-pITX User Manual
Page 8: Example 3
KTD-S0023-A Page
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