Kontron KTLX800-pITX - Manual (Page 8)

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