STV2050A datasheet(32/83 Pages) STMICROELECTRONICS

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STV2050A - VIDEO PATTERN GENERATOR

7 VIDEO PATTERN GENERATOR

The STV2050A provides a built-in video pattern generator for convergence adjustments. The

RGB signals are generated by 4-bit DACs with a voltage output. The FBLK signal is used to

switch the RGB source inside the TV set. The FBLK is a fixed-voltage output. The video pat-

tern generator delivers five types of video patterns:

– Cross-Hatch Grid:

Displays the physical locations corresponding to the stored correction values. Refer to Sec-

tion 7.2 "CROSS-HATCH GRID" on page 35.

– Cursor:

A crosshair is displayed at the place corresponding to the current addressed memory loca-

tion.

– Border Lines:

Used to adjust the convergence at the horizontal and vertical edges of the visible screen ar-

ea. Refer to Section 7.4 "BORDER LINES" on page 37.

– Gain Adjustment Lines:

Used to easily adjust the gain of the convergence channels and to optimize interlace mode.

– Auto-alignment Pattern:

Supports an auto-alignment procedure.

The video generator also produces the control signals for the optional optical loop functions.

The patterns can be modified using several parameters in the registers of the STV2050A.

STV2050A データシート(PDF) 32 Page - STMicroelectronics