STV8203 Просмотр технического описания (PDF) - STMicroelectronics
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STV8203 Datasheet PDF : 31 Pages
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STV8203
PROGRAMMING THE DEVICE (continued)
3.2 - Registers Controllable by Autostandard
FIR2C - FIR1C (FIR Coefficients)
Address
Type
: 23-24-25-26-27-28-29-2A & 31-32-33-34-35-36-37-38
: R/W
bit 7
bit 6
bit 5
bit 4
bit 3
FIR2 or FIR1 COEFFICIENT 0
FIR2 or FIR1 COEFFICIENT 1
FIR2 or FIR1 COEFFICIENT 2
FIR2 or FIR1 COEFFICIENT 3
FIR2 or FIR1 COEFFICIENT 4
FIR2 or FIR1 COEFFICIENT 5
FIR2 or FIR1 COEFFICIENT 6
FIR2 or FIR1 COEFFICIENT 7
bit 2
bit 1
bit 0
Each demodulator channel implements a 16 tap symetric FIR filter, each with 8 coefficients. The following
table gives the default values provided by the AUTOSTANDARD function (∆F = 50kHz in FM mode).
Tap
Number
0
System I FM/NICAM
CH1
CH2
0
0
System B/G Zweiton
CH1
CH2
0
0
System B/G FM/NICAM System L/L’ AM/NICAM
CH1
CH2
CH1
CH2
0
0
0
0
1
-2
0
-2
-2
-2
0
-2
0
2
-4
0
-4
-4
-4
-1
-4
-1
3
-3
0
-3
-3
-3
3
-3
3
4
2
-1
2
2
2
0
2
0
5
13
4
13
13
13
-12
13
-12
6
24
20
24
24
24
10
24
10
7
31
37
31
31
31
61
31
61
COFQ2 - COFQ1 (DCO Coarse Frequency)
Address
Type
Reset
: 2B-39
: R/W
: 0000 1100 for COFQ2 - 0000 1011 for COFQ1
bit 7
0
bit 6
0
bit 5
bit 4
bit 3
bit 2
bit 1
CHANNEL 2 or CHANEL 1 DCO COARSE FREQUENCY
bit 0
See FIFQ1/2 below for explanation.
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