STV2246 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STV2246 Datasheet PDF : 86 Pages
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STV224X, STV228X, STV223X - I²C BUS SELECTION
6.5 POWER-ON RESET - INITIAL BUS REGISTER CONDITIONS
Power-On Reset is active when the power supply VCCD is below 3 Volts.
All data from all registers must be written by microprocessor after power-on. Unused data must be set to
0. POR values are not tested during production.
Reg.
Initial Data Value
Addr.
(Hex) d7 d6 d5 d4 d3 d2 d1 d0
Comments
00 1 0 0 0 0 0 0 0 PIFVCO free running fine adjustment Typical.
01
0
0
0
0
0
1
1
1
PIFVCO coarse typ, BG = 38.9 MHz, Negative modulation, AFC active,
no PIF over-modulation regulation.
02 0 0 0 1 0 0 0 0 CVBS amplitude Typical, 2VPP.
03 0 0 1 0 0 0 0 0 Tuner AGC starting point Typical, Tuner AGC gain Min.
04 0 0
05 0 1
06 0 0
07 0 0
08 0 0
09 0 0
0A 0 0
0B 0 0
0C 0 0
0D 0 0
0E 0 0
0F 0 0
10 0 0
11 0 0
12 0 0
13 0 0
14 0 0
15 0 0
16 0 0
17 0 0
bsolete 18 0 0
19 0 0
1A 0 0
1B 0 0
1C 0 0
1D 0 0
1E 0 0
0
0
0
0
0
0
FM/AM out selected, FM de-emphasis and FM deviation auto-control, FM demod.
active, FM out selected, QSS and AM demod. active.
) 1 1 1 1 1 1 Volume control attenuation at maximum, linear curve (dB).
t(s 0
0
0
0
0
0
PIF < 42 MHz, 6.5 MHz sound carrier selected, auto AGC SIF time constant, saw
filter switch control at low level, CVBS out enabled, QSS mode.
c 1 0 0 0 0 0 Contrast at middle, blue screen disabled.
u 1 0 0 0 0 0 Saturation at middle, half contrast disabled, oversize blanking disabled.
d 1 0 0 0 0 0 Brightness at middle, RGB Blanking not active.
ro 1 0 0 0 0 0 Red drive at middle, RGBext insertion enabled (FBext Pin control).
1 0 0 0 0 0 Green drive at middle, black stretch disabled, black stretch ref 0IRE.
P 1 0 0 0 0 0 Blue drive at middle, cut-off loop active.
te 1 0 0 0 0 0 Red cut-off at middle, automatic cut-off loop.
1 0 0 0 0 0 Green cut-off at middle.
ole 0
0
1
0
0
0
Peaking on luma at middle, coring off, trap ON (CVBS & color identified), CVBS2
ON, white insertion not active.
s 0 1 0 0 0 0 APR disabled, APR threshold at middle, RGB OSD contrast disabled.
b 0
0
0
0
0
0
No shift of bell filter center frequency, 0dB P/N demod. gain, 90° matrix selection,
ACC overload ON.
- O 0
0
0
0
0
0
No shift of bandpass center frequency, chroma reference output off, chroma delay
line on.
) 0 0 0 0 0 0 Two crystals application P/S/N, PAL XTAL1 forced mode, two crystal applications.
t(s 1 0 0 0 0 0 Hue at middle, flesh disabled, normal flesh characteristic.
c 0
0
0
0
0
0
CVBS1 selected on main CVBS output, CVBS1 selected on second CVBS output,
CVBS mode.
u 1 0 0 0 0 0 Horizontal shift at middle, horizontal output enabled, interlace mode.
d 1 0 0 0 0 0 Vertical amplitude at middle, auto 50/60 Hz identification.
Pro 0
0
1
0
0
0
Vertical position at middle, automatic time constant selection on PLL1, PLL1 active,
Vertical synchronization active.
0
0
0
0
0
0
0.1 V low level at pin VERT, frame blanking adapted to standard, noise detector low
threshold.
0 0 0 0 0 0 Not active, auto cut-off.
0 0 0 0 0 0 Not active, auto cut-off.
0 0 0 0 0 0 Not active, auto cut-off.
0 0 0 0 0 0 R-Y output at pin 29 (SDIP56)
0 0 0 0 0 0 Not to be used, except d4: Auto. SIF AGC time constant control in L/L’ standards.
1F 0 0 0 0 0 0 0 0 VERT pulse active, standard luma delay, AVL off, AM/FM mono sound selected.
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