SAA7118H NXP Semiconductors, SAA7118H Datasheet - Page 146

• Manufacturer Part Number: SAA7118H
• Manufacturer: NXP Semiconductors

Specifications of SAA7118H

• Adc/dac Resolution: 9b
• Screening Level: Commercial
• Package Type: PQFP
• Pin Count: 160
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
SAA7118_7
Product data sheet
11.5.1 Trigger condition
11.5.2 Maximum zoom factor
11.5 Scaler and interfaces
Table 143
The ratio is defined as:
In the following settings the VBI data slicer is inactive. To activate the VBI data slicer,
VITX[1:0] 86h[7:6] has to be set to ‘11’. Depending on the VBI data slicer settings, the
sliced VBI data is inserted after the end of the scaled video lines, if the regions of VBI data
slicer and scaler overlaps.
To compensate the running-in of the vertical scaler, the vertical input window lengths are
extended by 2 lines to 290 lines, respectively 242 lines for XS, but the scaler increment
calculations are done with 288 lines, respectively 240 lines.
For trigger condition STRC[1:0] 90h[1:0] not equal to ‘00’.
If the value of (YO + YS) is greater than or equal to 262 (NTSC), respectively 312 (PAL)
the output field rate is reduced to 30 Hz, respectively 25 Hz.
Horizontal and vertical offsets (XO and YO) have to be used to adjust the displayed video
in the display window. As this adjustment is application dependent, the listed values are
only dummy values.
The maximum zoom factor is dependent on the back-end data rate and therefore
back-end clock and data format dependent (8-bit or 16-bit output). The maximum
horizontal zoom is limited to approximately 3.5, due to internal data path restrictions.
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•
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prsc = prescale ratio
fisc = fine scale ratio
vsc = vertical scale ratio
shows some examples for the scaler programming with:
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number of output pixel
Rev. 07 — 7 July 2008
number of input pixel
Multistandard video decoder with adaptive comb filter
SAA7118
© NXP B.V. 2008. All rights reserved.
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