SAA7103HB NXP Semiconductors, SAA7103HB Datasheet - Page 11

• Manufacturer Part Number: SAA7103HB
• Description: Video ICs PC GRAPHICS 45MHZ
• Manufacturer: NXP Semiconductors
• Type: Digital Video Encoderr

Specifications of SAA7103HB

• Operating Supply Voltage: 3 V to 3.6 V
• Supply Current: 140 mA
• Maximum Operating Temperature: + 70 C
• Package / Case: QFP-44
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Resolution: 10 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SAA7103H/V4,557

Philips Semiconductors
SAA7102_SAA7103_4
Product data sheet
7.5 RGB Y-C
7.6 Horizontal scaler
7.7 Vertical scaler and anti-flicker filter
Table 8:
RGB input signals to be encoded to PAL or NTSC are converted to the Y-C
space in this block. The color difference signals are fed through low-pass filters and
formatted to a ITU-R BT.601 like 4 : 2 : 2 data stream for further processing.
The matrix and formatting blocks can be bypassed for Y-C
When the auxiliary VGA mode is selected, the output of the cursor insertion block is
immediately directed to the triple DAC.
The high quality horizontal scaler operates on the 4 : 2 : 2 data stream. Its control engines
compensate the color phase offset automatically.
The scaler starts processing after a programmable horizontal offset and continues with a
number of input pixels. Each input pixel is a programmable fraction of the current output
pixel (XINC/4096). A special case is XINC = 0, this sets the scaling factor to 1.
If the SAA7102; SAA7103 input data is in accordance with “ITU-R BT.656”, the scaler
enters another mode. In this event, XINC needs to be set to 2048 for a scaling factor of 1.
With higher values, upscaling will occur.
The phase resolution of the circuit is 12 bits, giving a maximum offset of 0.2 after 800
input pixels. Small FIFOs rearrange a 4 : 2 : 2 data stream at the scaler output.
The functions scaling, Anti-Flicker Filter (AFF) and re-interlacing are implemented in the
vertical scaler.
Besides the entire input frame, it receives the first and last lines of the border to allow
anti-flicker filtering.
The circuit generates the interlaced output fields by scaling down the input frames with
different offsets for odd and even fields. Increasing the YSKIP setting reduces the
anti-flicker function. A YSKIP value of 4095 switches it off; see
The programming is similar to the horizontal scaler. For the re-interlacing, the resolutions
of the offset registers are not sufficient, so the weighting factors for the first lines can also
be adjusted. YINC = 0 sets the scaling factor to 1; YIWGTO and YIWGTE must not be 0.
Cursor pattern
00
01
10
11
Cursor modes
B
-C
R
matrix
Rev. 04 — 18 January 2006
Cursor mode
CMODE = 0
second cursor color
first cursor color
transparent
inverted input
SAA7102; SAA7103
B
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
-C
CMODE = 1
second cursor color
first cursor color
transparent
auxiliary cursor color
R
Table
graphics input.
Digital video encoder
91.
B
-C
R
color
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