FS401 Datasheet, PDF (61/104 Pages) List of Unclassifed Manufacturers – PC to TV Video Scan Converters

FS401, FS403
PRODUCT SPECIFICATION
REV. NO. 1.7
4.5.33 VSS – Vertical Scale Step
Vertical Scale Step Low (6E)
7
VSS₇
6
VSS ₆
5
VSS ₅
4
VSS ₄
3
VSS ₃
2
VSS ₂
1
VSS ₁
0
VSS ₀
Vertical Scale Step High (6F)
7
VSS ₁₅
6
VSS ₁₄
5
VSS ₁₃
4
VSS ₁₂
3
VSS ₁₁
2
VSS ₁₀
1
VSS ₉
0
VSS ₈
Description:
This offsets the vertical scale from its nominal value. A positive number stretches the image and a
negative number compresses the image.
If the value written to VSS is beyond the internally calculated limit, the maximum (or minimum in case of a
negative number) will be written back to the VSS register. An external processor can then read VSS to
determine if the last value written to VSS was beyond the limit.
NOTE: It can take up to 25ms for the internal micro-controller calculates the limits for HPO, VPO, HSS,
VSS, HPP, and VPP. These registers should not be read until 10ms after writing to any of these registers.
Range:
{-32768 : +32767} 2’s Complement
Reset Value: 0x0000
JANUARY 24, 2007
61
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