STV2246H STMicroelectronics, STV2246H Datasheet - Page 56

• Manufacturer Part Number: STV2246H
• Manufacturer: STMicroelectronics

Specifications of STV2246H

• Lead Free Status / Rohs Status: Compliant

6.5 POWER-ON RESET - INITIAL BUS REGISTER CONDITIONS
Power-On Reset is active when the power supply V
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.
Addr.
(Hex)
Reg.
0A
0B
0C
0D
0E
1A
1B
1C
1D
1E
00
01
02
03
04
05
06
07
08
09
0F
10
11
12
13
14
15
16
17
18
19
1F
d7 d6 d5 d4 d3 d2 d1 d0
1 0 0 0 0 0 0 0 PIFVCO free running fine adjustment Typical.
0 0 0 0 0 1 1 1
0 0 0 1 0 0 0 0 CVBS amplitude Typical, 2V
0 0 1 0 0 0 0 0 Tuner AGC starting point Typical, Tuner AGC gain Min.
0 0 0 0 0 0 0 0
0 1 1 1 1 1 1 1 Volume control attenuation at maximum, linear curve (dB).
0 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 Contrast at middle, blue screen disabled.
0 0 1 0 0 0 0 0 Saturation at middle, half contrast disabled, oversize blanking disabled.
0 0 1 0 0 0 0 0 Brightness at middle, RGB Blanking not active.
0 0 1 0 0 0 0 0 Red drive at middle, RGBext insertion enabled (FBext Pin control).
0 0 1 0 0 0 0 0 Green drive at middle, black stretch disabled, black stretch ref 0IRE.
0 0 1 0 0 0 0 0
0 0 1 0 0 0 0 0 Red cut-off at middle, automatic cut-off loop.
0 0 1 0 0 0 0 0 Green cut-off at middle.
0 0 0 0 1 0 0 0
0 0 0 1 0 0 0 0 APR disabled, APR threshold at middle, RGB OSD contrast disabled.
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 Two crystals application P/S/N, PAL XTAL1 forced mode, two crystal applications.
0 0 1 0 0 0 0 0 Hue at middle, flesh disabled, normal flesh characteristic.
0 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 Horizontal shift at middle, horizontal output enabled, interlace mode.
0 0 1 0 0 0 0 0 Vertical amplitude at middle, auto 50/60 Hz identification.
0 0 0 0 1 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 Not active, auto cut-off.
0 0 0 0 0 0 0 0 Not active, auto cut-off.
0 0 0 0 0 0 0 0 Not active, auto cut-off.
0 0 0 0 0 0 0 0 R-Y output at pin 29 (SDIP56)
0 0 0 0 0 0 0 0 Not to be used, except d4: Auto. SIF AGC time constant control in L/L’ standards.
0 0 0 0 0 0 0 0 VERT pulse active, standard luma delay, AVL off, AM/FM mono sound selected.
Initial Data Value
PIFVCO coarse typ, BG = 38.9 MHz, Negative modulation, AFC active,
no PIF over-modulation regulation.
FM/AM out selected, FM de-emphasis and FM deviation auto-control, FM demod.
active, FM out selected, QSS and AM demod. active.
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.
Peaking on luma at middle, coring off, trap ON (CVBS & color identified), CVBS2
ON, white insertion not active.
No shift of bell filter center frequency, 0dB P/N demod. gain, 90° matrix selection,
ACC overload ON.
No shift of bandpass center frequency, chroma reference output off, chroma delay
line on.
CVBS1 selected on main CVBS output, CVBS1 selected on second CVBS output,
CVBS mode.
Vertical position at middle, automatic time constant selection on PLL1, PLL1 active,
Vertical synchronization active.
0.1 V low level at pin VERT, frame blanking adapted to standard, noise detector low
threshold.
Blue drive at middle, cut-off loop active.
STV224X, STV228X, STV223X - I²C BUS SELECTION
CCD
is below 3 Volts.
PP.
Comments
56/86