STV2246 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STV2246 Datasheet PDF : 86 Pages
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STV224X, STV228X, STV223X - I²C BUS SELECTION
6.3 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 XXXXXXX0
6.3.2 PIF Free Running Coarse
Reg.
Addr.
) (Hex)
Description
t(s 01 PIFVCO Free
Running Coarse
Adjustment for
c 38.9 MHz Carrier
u PIFVCO Free
d Running Coarse
ro Adjustment for
33.9 MHz Carrier
P (L’)
te PIF Modulation
le L/L’ Standard
o Selection
s Digital AFC Defeat
b PIF
O 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
t(s Reg.
Addr.
c (Hex)
Description
Data
Bits
d7 d6 d5 d4 d3 d2 d1 d0
Comments
rodu 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
P Overmodulation
teReset
1 X 0 X X X X X X 0 = Normal Operating Mode
X 1 X X X X X X 1 = Overmodulation Reset
bsole 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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