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WT60P1

Digital Monitor Controller

Weltrend Semiconductor 

Test Pattern Generation

WT60P1

Digital Monitor Controller

Ver. 1.51 Jul-31-1998

A self-test pattern signal comes out from pin PB3/PAT. It can generate a cross hatch picture, a

inverted cross hatch picture, a white picture or a black picture.

8 X 8 cross hatch

Inverted 8 X 8 cross hatch

White Picture

Black Picture

The test pattern signal is generated when SELF and ENPAT are both set to “1”. This vedio signal

will synchronize to the free-running Hsync and Vsync, no matter which frequency is chosen. The

following diagram shows the timing relationship of cross hatch picture.

HSO

PAT

T1

HSO

31.1kHz

47.9kHz

64kHz

VSO

60.8Hz

74.9Hz

62.5Hz

T2

T1

T1

6us

5.125us

3.625us

T3

T2

1us

0.625us

0.875us

T2

T3

62.5ns

62.5ns

62.5ns

Weltrend Semiconductor, Inc.

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