STV5730A STMicroelectronics, STV5730A Datasheet - Page 15

• Manufacturer Part Number: STV5730A
• Description: Multimedia Misc On-Screen Display
• Manufacturer: STMicroelectronics
• Type: Satellite Receiverr

Specifications of STV5730A

• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Package / Case: SO
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 1
Figure 5 :
FUNCTIONAL DESCRIPTION (continued)
9 - VIDEO FULL PAGE MODE
In addition to the normal full page mode in which a
uniformely colored screen background is gener-
ated, the STV5730A is able to perform a ”video full
page mode”.
Normal and video full page mode are selected by
the control bit C11 (respectively set high and low).
By using the video full page mode the channel
capture operation can be easily monitored on the
screen since the signal at the VIDEO IN input is
displayed, unlocked, in the screen background
area ; the text being stable and colored, with or
without colored background.
Presence detection is permanently active to keep
the microcontroller informed of the input signal
quality. The information is delivered by the MUTE
pin.
This information can be used by the microcontroller
to force the STV5730A into the mixed mode (set
C0 low) when the input signal becomes good
enough.
INTERNAL BIAS
VIDEO OUT1
VIDEO OUT2
S
Y
S-VHS Input/Output Configuration
23
2
C
High impedance
VIDEO IN
CVBS (OSD)
FULL PAGE
CIN
PAL/NTSC
(OSD)
CVBS
ATTENUATOR
STV5730A
CHARACTER
GATED
FB
15
VIDEO OUT1
VIDEO OUT2
COUT
TRANSLUCENT PAL/NTSC/SECAM
22
28
1
R
2
x Text
R
R
VIDEO IN or Text
OP TIONAL
1
2
FILTER
VIDEO IN or
VIDEO IN
R
1
In the video full page mode, it can be usefull to set
the M11 (mode register) bit high, so that the mute
signal is not synchronized on the vertical sync, thus
accelerating the VIDEO IN presence detection.
10 - S-VHS APPLICATION (see Figure 5)
The STV5730Acan be used in S-VHS applications
easily.
The Y signal must be delivered to the VIDEO IN
input. The VIDEO OUT1 output then delivers a
Y + text signal, whilst the VIDEO OUT2 delivers the
Y input signal, provided that the CIN input is con-
nected to a bias DC level.
An external switch must be used to select the C
signal in mixed mode or the COUT output signal in
full page mode.
In mixed mode the chroma signal (C) can be exter-
nally attenuated (multistandard translucent opera-
tion) or killed (PAL/NTSC opaque operation only)
during the character gate controlled by the fast
blanking signal.
R
1
R
x VIDEO IN
Y
Y or Te xt
Y or
2
OSD
MM
FP
R
MIXED MODE
Mixed Mode (MM)
Full Page Mode (FP)
2
*
R
EXTERNAL
Te xt
SWITCH
1
R
2
R
1
*
Y
C
OPAQUE PAL/NTSC
VIDEO IN or Text
Full page mode
Opaque mixed mode
Trans luce nt mixed mode
High Impedance
VIDEO IN
or Text
STV5730A
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