WT6116 Просмотр технического описания (PDF) - Weltrend Semiconductor

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WT6116

microcontroller for digital controlled monitor

Weltrend Semiconductor 

WT6132/WT6124/WT6116

Data Sheet Rev. 1.01

Composite Sync Signal Separator

Composite sync signal separator extract Vsync signal from HIN or SOGIN input pin by filtering pulses

which is less than 6us. The output Vsync signal will be widened about 5.5~6.5us. The output Hsync will

be replaced by 2us pulse during Vsync pulse.

The composite sync signal separator can handle H+V and H exclusive OR V signals. Fig.5 shows the

timing relationship of the extracted H and V sync signals.

If Hsync output do not want to insert pseudo H pulses (EXTRHS signal) during Vsync pulse, set BYPASS

bit can let HOUT pin output waveform same as Hsync input (Note: polarity can be controlled by HOPOL

bit).

Hsync

Vsync

H+V

H XOR V

EXTRHS

EXTRVS

Bypass H pulse

Hsync

Insert H pulse

2us

2us

Bypass H pulse

5.5~6.5us

Vsync

H EORV

EXTRHS

EXTRVS

Bypass H pulse

Insert H pulse

2us

2us

Bypass H pulse

5.5~6.5us

Fig. 6 Timing relationship of composite sync signal separator

Weltrend Semiconductor, Inc.

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