saa7120 NXP Semiconductors, saa7120 Datasheet - Page 7

• Manufacturer Part Number: saa7120
• Description: Digital Video Encoder Condenc
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1997 Jan 06
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handbook, full pagewidth
Digital Video Encoder (ConDENC)
(1) CCRS1 = 0; CCRS0 = 0.
(1) SCBW = 1.
(2) SCBW = 0.
(dB)
G v
(dB)
G v
Fig.4 Luminance transfer characteristic 2.
1
0
1
2
3
4
5
12
18
24
30
36
42
48
54
6
0
6
0
0
2
2
(1)
(1)
4
Fig.5 Chrominance transfer characteristic 1.
4
f (MHz)
(2)
MBE736
6
6
7
During reset (RESET = LOW) and after reset is released,
all digital I/O stages are set to input mode. A reset forces
the I
sets register 3A to 03H, register 61 to 06H,
registers 6BH and 6EH to 00H and bit TTX60 to 0.
All other control registers are not influenced by a reset.
Encoder
V
The encoder generates out of Y, U and V baseband
signals luminance and colour subcarrier output signals,
suitable for use as CVBS or separate Y and C signals.
Luminance is modified in gain and in offset (the latter
programmable in a certain range to enable different black
level set-ups). A fixed synchronization level in accordance
with standard composite synchronization schemes is
inserted. The inserted blanking level is programmable to
allow for manipulations with Macrovision anti-taping.
Additional insertion of AGC super-white pulses,
programmable in height, is supported.
IDEO PATH
2
C-bus interface to abort a running bus transfer and
8
10
SAA7120; SAA7121
Preliminary specification
12
f (MHz)
MBE737
14