TDA8846 Ver la hoja de datos (PDF) - Philips Electronics
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TDA8846 Datasheet PDF : 68 Pages
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Philips Semiconductors
I2C-bus controlled PAL/NTSC/SECAM TV
processors
Tentative Device Specification
TDA884X/5X-N2 series
Table 50 Bypass of chroma base-band delay line
BPS
0
1
active
bypassed
DELAY LINE MODE
Table 51 Automatic colour limiting
ACL
0
1
not active
active
COLOUR LIMITING
Table 52 Enable external comb filter
CMB
0
1
disabled
enabled
COMB FILTER
Table 53 Start-up mode of black current loop; note 1
AST
0
1
MODE
automatic mode;
switch-on under control of µ-processor
Note
1. When the circuit is in the automatic mode the RGB
drive is switched-on as soon as the black current loop
has stabilised. Under control of the µ-processor the
condition of the black current loop is indicated via the
BCF bit. When this bit changes to 0 the RGB drive can
be switched-on by setting the AST bit to 0.
Table 54 Cathode drive level
CL2 CL1 CL0
SETTING CATHODE DRIVE
AMPLITUDE; NOTE 1
0
0
0 57VBL-WH
0
0
1 63 VBL-WH
0
1
0 70 VBL-WH
0
1
1 77 VBL-WH
1
0
0 84 VBL-WH
1
0
1 91 VBL-WH
1
1
0 99 VBL-WH
1
1
1 107 VBL-WH
Note
1. The given values are valid for the following conditions:
- Nominal CVBS input signal
- Settings for contrast, WPA and peaking nominal
- Black- and blue-stretch switched-off
- Gain of output stage such that no clipping occurs
- Beam current limiting not active
The tolerance on these values is about ± 3 V.
Table 55 Y-delay adjustment; note 1
YD0 to YD3
Y-DELAY
YD3
YD3 ∗ 160 ns +
YD2
YD2 ∗ 80 ns +
YD1
YD1 ∗ 40 ns +
YD0
YD0 ∗ 40 ns
Note
1. For an equal delay of the luminance and chrominance
signal the delay must be set at a value of 160 ns. This
is only valid for a CVBS signal without group
delay distortions.
Table 56 Dynamic skin control on/off
DS
0
off
1
on
MODE
Table 57 Dynamic skin control angle
DSA
0
1
ANGLE OF CORRECTION
correction angle 123 degrees
correction angle 117 degrees
December 16, 1997
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