STV2247H View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
STV2247H Datasheet PDF : 86 Pages
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STV224XH/228XH/223XH - I²C BUS SELECTION
6.3 INPUT SIGNALS (WRITE MODE)
Not used data bits must be set to “0”.
6.3.1 PIFVCO Free Running
Reg.
Addr.
(Hex)
Description
00 PIFVCO
Free Running
Fine Adjustment
Not to be used
Data
Bits
d7 d6 d5 d4 d3 d2 d1 d0
Comments
7 0 0 0 0 0 0 0 X PIF Typical + 0.7 MHz.
1 0 0 0 0 0 0 X PIF Free Running mid range.
1 1 1 1 1 1 1 X PIF Typical - 0.7 MHz.
1 XXXXXXX 0
6.3.2 PIF Free Running Coarse
Reg.
Addr.
Description
(Hex)
01 PIFVCO Free
Running Coarse
Adjustment for
38.9 MHz Carrier
PIFVCO Free
Running Coarse
Adjustment for
33.9 MHz Carrier
(L’)
PIF Modulation
L/L’ Standard
Selection
Digital AFC Defeat
PIF
Over-modulation
Data
Bits
d7 d6 d5 d4 d3 d2 d1 d0
Comments
X X 0 X 0 0 0 0 PIFVCO = F0 + 2.0 MHz.
4 X X 0 X 0 1 1 1 PIFVCO = F0 (mid range).
X X 0 X 1 1 1 1 PIFVCO = F0 - 1.8 MHz.
X X 1 1 0 0 0 0 PIFVCO = F0 + 1.3 MHz.
4 X X 1 1 0 1 1 1 PIFVCO = F0 (mid range).
X X 1 1 1 1 1 1 PIFVCO = F0 - 1.2 MHz.
1 X X X 0 X X X X 0 = Negative Modulation.
X X X 1 X X X X 1 = Positive Modulation.
1 X X 0 1 X X X X 0 = L Standard.
X X 1 1 X X X X 1 = L’ Standard.
1 X 0 X X X X X X 0 = AFC Active.
X 1 X X X X X X 1 = AFC Defeat (read register 02, d2 d1 d0 = 000).
1 0 X X X X X X X 0 = Over-modulation detection off.
1 X X X X X X X 1 = Over-modulation regulation active.
6.3.3 PIF Features
Reg.
Addr.
(Hex)
Description
Data
Bits
d7 d6 d5 d4 d3 d2 d1 d0
Comments
02
CVBS Output Ampli- 5
tude
X X X 0 0 0 0 0 VTyp. - 1.6 dB.
X X X 1 0 0 0 0 VTyp. = 1.6 V (black / white).
X X X 1 1 1 1 1 VTyp.+ 1.5 dB.
Not to be used
1 XX0XXXXX
Overmodulation
Reset
1 X 0 X X X X X X 0 = Normal Operating Mode
X 1 X X X X X X 1 = Overmodulation Reset
CVBS Output
1 0 X X X X X X X 0 = 2 VPP, no external sound trap.
1 X X X X X X X 1 = 2.3 VPP, external sound trap.
47/86
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