AL128 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

AL128

Plug and Play VGA to NTSC/PAL Converter

Unspecified 

AL128

VGA Input

VSYNC

V-total (Reg # 43h)

Source Vertical Size (Reg# 24h)

V-pan Delta (Reg #22h), (Reg #2Ch for Zoom)

Default V-Capture Start

(see H/W table)

* Ratio defined in Reg # 26h

TV Output

TVVSYNC

Down-Sample Vertical

Size (Reg #25h)

V-display Delta

(Reg #51h)

Default Vertical Display Start (see H/W table)

Al128-17 Timing_vertical

Details about register programming can be found in the Register Definition Section. Typical values

of the parameters for using AL128 with AL422 can be found in the AL128 Application Notes

Supplement.

6.4 Supported Resolutions

The resolutions that are automatically supported without any software are 640x400, 640x480 and

800x600. Other resolutions, such as 1024x768 full screen, are also supported through software

programming. Scan rates up to 100 Hz are supported for 640x480 resolution, up to 85 Hz for

800x600 resolution, and up to 75 Hz for 1024x768 resolution.

April 2, 1999

17

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