SAA7128H/V1,557 NXP Semiconductors, SAA7128H/V1,557 Datasheet - Page 7

• Manufacturer Part Number: SAA7128H/V1,557
• Manufacturer: NXP Semiconductors

Specifications of SAA7128H/V1,557

• Adc/dac Resolution: 10b
• Screening Level: Commercial
• Package Type: PQFP
• Pin Count: 44
• Lead Free Status / RoHS Status: Compliant

Philips Semiconductors
9397 750 14325
Product data sheet
7.1.1.1 Configuration 1
7.1.1 Configuration examples
7.1 Versatile fader
During reset (RESET_N = LOW) and after reset is released, all digital I/O stages are set
to input mode and the encoder is set to PAL mode and outputs a ‘black burst’ signal on
CVBS and S-video outputs, while RGB outputs are set to their lowest output voltages.
A reset forces the I
Important note: whenever the fader is activated with the SYMP bit set to a logic 1
(enabling the detection of embedded Start of Active Video (SAV) and End of Active Video
(EAV)), codes 00h and FFh are not allowed within the actual video data (as prescribed by
ITU-R BT.656 ). If SAV (00h) has been detected, the fader automatically passes 100% of
the respective signal until SAV is detected.
Within the digital video encoder, two data streams can be faded against each other; these
data streams can be input to the double speed MPEG port, which is able to separate two
independent 27 MHz data streams MP
and EDGE2.
Figure 4
and the outputs, separated into the composite (and S-video) encoder and the RGB
encoder.
Input MP
simultaneously to composite (and S-video) and RGB output (RGBIN = ENCIN = 1). In this
example, either MP
and out.
Fig 3. Cross switch
•
•
•
Black and blanking level control
Color subcarrier frequency
Variable burst amplitude, etc.
to
A
can be faded into MP
Figure 7
2
A
C-bus interface to abort any running bus transfer.
show examples on how to configure the fader between the input ports
or MP
Rev. 03 — 9 December 2004
MP
MP
neg
pos
B
could be an overlay (menu) signal to be faded smoothly in
B
. The resulting output of the fader is then encoded
A
and MP
SAA7128H; SAA7129H
EDGE1 = 0
EDGE2 = 1
B
via a cross switch controlled by EDGE1
mhb574
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
MP
MP
B
A
Digital video encoder
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