STV8287D View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
STV8287D
STMicroelectronics
'STV8287D' PDF : 149 Pages View PDF
STV82x7
Digital Demodulator
System Sound Type
D/K2
D/K3
I
L
M/N
FM 2-Carrier
FM 2-Carrier
FM Mono
FM/NICAM
AM/NICAM
FM Mono
FM 2-Carrier
Table 4: Recognized Standards (Continued)
Type
Name
Carrier 1
(MHz)
Carrier 2
(MHz)
FM Deviation
Nom. Max. Over
De-
emphasis
Roll
-off
(%)
Pilot
Frequency
(kHz)
A2*
6.5
A2*
6.5
6.0
6.0
6.5
4.5
A2+
4.5
6.742
5.742
50 µs
50 µs
54.6875
54.6875
6.552
5.850
4.724
27 50 80
15 27 50
15 27 50
J17 100
J17
40
75 µs
75 µs
55.069
For Chinese TV transmissions (DK-NICAM) which are subject to overmodulation, different FM
deviations are proposed for sound demodulation.
Sound Carrier Frequency Offset Recovery: Both Mono and Stereo IF Carrier frequencies can be
adjusted independently (registers CAROFFSET1 and CAROFFSET2) within a large range (up to
120 kHz for standard mono FM deviations) while the Automatic Standard Recognition System
remains active. The frequency offset estimation is written in registers DC_REMOVAL_L and
DC_REMOVAL_R (Mono Left / Channel 1 and Mono Right / Channel 2, respectively) and can be
used to implement the Automatic Frequency Control (AFC) via an external I²C control.
Manual Mode: If required, the Automatic Standard Recognition System system can be disabled
(Manual mode) and the user can control all registers including those only controlled by the
Automatic Standard Recognition System function when active. Manual mode is selected in register
AUTOSTD_STANDARD_DETECT (bit LDK_SCK, I_SCK, BG_SCK and MN_SCK set to 0).
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