stv8226t STMicroelectronics, stv8226t Datasheet - Page 16
stv8226t
Manufacturer Part Number
stv8226t
Description
Multistandard Tv Audio Processor And Digital Sound Demodulator
Manufacturer
STMicroelectronics
Datasheet
1.STV8226T.pdf
(97 pages)
- Current page: 16 of 97
- Download datasheet (2Mb)
Demodulator Block
Note:
2.2
Note:
16/97
NICAM Dual Mono (no backup) (D1
NICAM Mono+Data (no backup)
NICAM undefined (no backup)
NICAM Stereo (no backup)
(CH1 = A, CH2 = B)
(D1 = A, D2 = Data)
(D1 = B, D2 = Data)
NICAM Mono+Data
NICAM Dual Mono
System Mode
D1 and D2 define the two channels encoded in the NICAM packet.
System Clock
The System Clock integrates a low-jitter PLL clock and can be fully reprogrammed via registers
PLL_DIV, PLL_MD,
27-MHz quartz crystal frequency, which is the recommended frequency for minimizing potential
RF interference in the application. This sinusoidal clock frequency, and any harmonic products,
remains outside the TV picture and sound IF (PIF/SIF) and Band-I RF passbands and has been
selected in order to reduce the risk of potential interference to the TV IF and RF system.
However, if required, the PLL clock can be re-programmed for an other quartz crystal frequency
within a range between 23 and 30 MHz.
A change in the crystal frequency is compatible with other default I²C programming values,
including those of the built-in Automatic Standard Recognition System.
NICAM Stereo
NICAM Data
= B, D2 = C)
PLL_PEH
NICAM_STAT[
Table 5: NICAM System Transmission Modes
X1XX
1000
1010
1001
1011
0000
0010
0001
4:1]
and PLL_PEL. The default values are designed for a standard
De-emphasis
NICAM
J17
J17
J17
J17
J17
J17
J17
J17
CH_LANG[1:0]
XX
XX
XX
XX
01
10
01
00
01
10
11
01
10
NICAM Mono C
NICAM Mono A
NICAM Mono B
NICAM Mono A
FM/AM Mono A
FM/AM Mono A
NICAM Mono B
FM/AM Mono A
NICAM Mono B
NICAM Stereo
NICAM Stereo
FM/AM Mono
FM/AM Mono
Selection
Sound
FM/AM Mono
FM/AM Mono
FM/AM Mono
Backup
Sound
STV82x6
Mute
Mute
Mute
Mute
X
X
X
X
X
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