STV8203 ST Microelectronics, STV8203 Datasheet - Page 25

• Manufacturer Part Number: STV8203
• Description: MULTISTANDARD TV SOUND DEMODULATOR
• Manufacturer: ST Microelectronics

PROGRAMMING THE DEVICE (continued)
3.2 - Registers Controllable by Autostandard
FIR2C - FIR1C (FIR Coefficients)
Address
Type
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).
COFQ2 - COFQ1 (DCO Coarse Frequency)
Address
Type
Reset
See FIFQ1/2 below for explanation.
Number
Tap
bit 7
0
1
2
3
4
5
6
7
bit 7
0
System I FM/NICAM
: 23-24-25-26-27-28-29-2A & 31-32-33-34-35-36-37-38
: R/W
CH1
: 2B-39
: R/W
: 0000 1100 for COFQ2 - 0000 1011 for COFQ1
13
24
31
-2
-4
-3
0
2
bit 6
bit 6
0
CH2
20
37
-1
0
0
0
0
4
bit 5
bit 5
System B/G Zweiton
CH1
13
24
31
-2
-4
-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
0
2
CHANNEL 2 or CHANEL 1 DCO COARSE FREQUENCY
bit 4
bit 4
CH2
13
24
31
-2
-4
-3
0
2
bit 3
bit 3
System B/G FM/NICAM
CH1
13
24
31
-2
-4
-3
0
2
bit 2
bit 2
CH2
-12
10
61
-1
0
0
3
0
System L/L’ AM/NICAM
bit 1
bit 1
CH1
13
24
31
-2
-4
-3
0
2
STV8203
bit 0
bit 0
CH2
-12
10
61
-1
0
0
3
0
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