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參數(shù)資料
| 型號(hào)： | STV2246 |
| 元件分類： | 參考電壓二極管 |
| 英文描述： | Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode |
| 中文描述： | 250 的低電流運(yùn)算，低反向泄露，低噪聲穩(wěn)壓二極管 |
| 文件頁數(shù)： | 51/76頁 |
| 文件大?。?/td> | 2157K |
| 代理商： | STV2246 |
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STV223XD/224XC -
I2C BUS SELECTION
51/76
6.5 POWER-ON RESET - INITIAL BUS REGISTER CONDITIONS
Power-On Reset is active when the power supply V
CCD
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.
Addr.
(Hex)
00
Initial Data Value
Comments
d7 d6 d5 d4 d3 d2 d1 d0
1
0
0
0
0
0
0
0
PIFVCO free running fine adjustment Typical.
PIFVCO coarse typ, BG = 38.9 MHz, Negative modulation, AFC active,
no PIF over-modulation regulation.
CVBS amplitude Typical, 2V
PP.
Tuner AGC starting point Typical, Tuner AGC gain Min.
FM/AM out selected, FM de-emphasis and FM deviation auto-control, FM demod.
active, FM out selected, QSS and AM demod. active.
Volume control attenuation at maximum, linear curve (dB).
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.
Contrast at middle, cut-off pulse insertion after internal frame blanking, blue screen
disabled.
Saturation at middle, half contrast disabled, oversize blanking disabled.
Brightness at middle, RGB Blanking not active.
Red drive at middle, RGBext insertion enabled (FBext Pin control).
Green drive at middle, black stretch disabled, black stretch ref 0IRE.
Blue drive at middle, cut-off loop active.
Red cut-off at middle, automatic cut-off loop.
Green cut-off at middle.
Peaking on luma at middle, coring off, trap ON(CVBS & color identified), CVBS2 ON,
white insertion not active.
APR disabled, APR threshold at middle, RGB OSD contrast disabled.
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.
Two crystals application P/S/N, PAL XTAL1 forced mode, two crystal applications.
Hue at middle, flesh disabled, normal flesh characteristic.
CVBS1 selected on main CVBS output, CVBS1 selected on second CVBS output,
CVBS mode.
Horizontal shift at middle, horizontal output enabled, interlace mode.
Vertical amplitude at middle, auto 50/60 Hz identification.
Vertical position at middle, automatic time constant selection on PLL1, PLL1 active,
Vertical synchronization active.
0.1 V low level at pin VOUT, frame blanking adapted to standard, noise detector low
threshold.
Not active, auto cut-off.
Not active, auto cut-off.
Not active, auto cut-off.
R-Y output at pin 29 (SDIP56) or at pin 41 (TQFP64)
Not to be used, except d4: Auto. SIF AGC time constant control in L/L’ standards.
VOUT pulse active, standard luma delay, AVL off, AM/FM mono sound selected.
01
0
0
0
0
0
1
1
1
02
03
0
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
04
0
0
0
0
0
0
0
0
05
0
1
1
1
1
1
1
1
06
0
0
0
0
0
0
0
0
07
0
0
1
0
0
0
0
0
08
09
0A
0B
0C
0D
0E
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0F
0
0
0
0
1
0
0
0
10
0
0
0
1
0
0
0
0
11
0
0
0
0
0
0
0
0
12
0
0
0
0
0
0
0
0
13
14
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
15
0
0
0
0
0
0
0
0
16
17
0
0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
18
0
0
0
0
1
0
0
0
19
0
0
0
0
0
0
0
0
1A
1B
1C
1D
1E
1F
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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| STV2247C | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:I2C BUS-CONTROLLED MULTISTANDARD SINGLE CHIP TV PROCESSOR |
| STV2247H | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:IC BUS-CONTROLLED MULTISTANDARD SINGLE CHIP TV PROCESSOR |
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