SDA9489X ETC [List of Unclassifed Manufacturers], SDA9489X Datasheet - Page 34

• Manufacturer Part Number: SDA9489X
• Description: PIP IV Advanced SOPHISTICUS High-End Picture-In-Picture ICs
• Manufacturer: ETC [List of Unclassifed Manufacturers]

SDA 9489X
SDA 9589X
Table 4-20
For variations of parental horizontal frequency (e.g. VCR), a digital correction of the
position is useful to stabilize the picture (POSCOR). This circuit detects a varying
parental line frequency and moves the picture to the place, where it would have been
without this frequency deviation. The deviation is calculated once a field.
4.8.6
For controlling an external RGB or YUV switch a select signal is supplied. The delay of
this signal is programmable for adaptation to different external output signal processing
devices (SELDEL).
Figure 4-16 Select timing
4.8.7
Displaying a bright PIP picture, the beamcurrent-limitation of the parent system may
become active. This may cause the parent picture to be influenced by the inset picture.
Therefore a detection circuit reduces the brightness of the inset picture when the
average brightness is above a selectable threshold. After bright picture content has
disappeared, the initial brightness reappears. The threshold is adjustable via ABRTHD
and the speed via ABRSPD. Both settings have to be selected for parent system
accordingly.
Micronas
SEL
OUTx
PiP signal
display
format
16:9
16:9
4:3
4:3
Select Signal
Automatic Brightness Reduction
Format conversion using HZOOM
picture
format
inset
16:9
4:3
4:3
4:3
PiP format
desired
16:9
16:9
4:3
4:3
frame
SELDEL
picture
frequency
required
parent
20.25
27
36
36
Preliminary Data Sheet
value of HZOOM
D2
0
0
0
0
System Description
D1
0
0
1
1
D0
0
1
0
0
4-34