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VTG - video timing generator

Note: To work directly with timing values you must select the configuration "custom" otherwise the timing values will be overwritten after an update. All horizontal input values must be multiple of 8 to ensure non-fraction programming values and mind the maximum clock rate of your device! Transferdelay is based on a 5 cycle EMI of a 20 MHz Transputer.

The IMS G300 and IMS G332 color video controllers have a software configurable video timing generator. The calculation of the parameters is straightforward but tricky documented. Only non-interlaced video timing is currently implemented.

Setup

Controller

Monitor timing

Pixel frequency  x  MHz

  Display Front Sync Back  
Horizontal timing  pixel
Vertical timing  lines

Timing values

Pixel frequency25.000 MHz  
 
Resolution H640 pixelResolution V480 pixel
H-DISP25.600 μsV-DISP15.206 ms
H-BL6.080 μsV-BL1.457 ms
H-FP0.640 μsV-FP0.063 ms
H-SYNC2.560 μsV-SYNC0.063 ms
H-BP2.880 μsV-BP1.331 ms
1H31.680 μs1V16.664 ms
H frequency31.566 kHzV frequency60.011 Hz

Programming values

HalfSync8
BackPorch18
Display160
ShortDisplay61
BroadPulse95
VSync4
VBlank80
VDisplay960
Linetime198
VPreEqualise4
VPostEqualise4
TransferDelay11 or 9 @25MHz

Check rules

Greater-zero
Odd Linetime
Halfline point
Back porch

Environment string

set IVTG=G332;1;5;8;18;160;61;95;4;80;960;198;4;4;11

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Last modification: 1/27/2012 3:49:08 PM