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STV0196 Datasheet(PDF) 5 Page - STMicroelectronics

Part # STV0196
Description  QPSK/BPSK DEMODULATOR AND FEC IC
PDF  23 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV0196 Datasheet(HTML) 5 Page - STMicroelectronics

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I.4 - Register Map
FUNCTIONAL DESCRIPTION (continued)
REGISTER HEX 00
INPUT CONFIGURATION REGISTER (R/W)
Reset Value : Hex 04
0
-Q(1) or Q(0) input
1
Signed (1) or positive (0) I & Q inputs
2
Nyquist filtering on (1) / off (0)
3
BPSK (1), QPSK(0)
4
To be set to 0.
5
To be set to 0.
6
To be set to 0.
7
To be set to 0.
REGISTERS HEX 01 TO HEX 05
VITERBI, PUNCTURE RATE THRESHOLDS (R/W)
Reset Value : Hex 20
rate
Hex01 VTH0 0 Th6 Th5 Th4 Th3 Th2 Th1 Th0 1/2
Hex02 VTH1 0 Th6 Th5 Th4 Th3 Th2 Th1 Th0 2/3
Hex03 VTH2 0 Th6 Th5 Th4 Th3 Th2 Th1 Th0 3/4
Hex04 VTH3 0 Th6 Th5 Th4 Th3 Th2 Th1 Th0 5/6
Hex05 VTH4 0 Th6 Th5 Th4 Th3 Th2 Th1 Th0
7/8
or
6/7
REGISTER HEX 06
VSEARCH (VITERBI) (R/W)
Reset Value : Hex 19
0
H[1..0]
Sync counter hysteresis value
1
2
T[1..0]
Sync search time out
3
4
SN[1..0]
VITERBI error rate averaging period.
C/N indicator averaging period.
5
6
F
VITERBI operating status freeze (1)
7
A/M
(0) automatic, (1) manual
REGISTER HEX 07
VERROR REGISTER (Read only)
REGISTER HEX 08
VSTATUS REGISTER (Read only)
0
PR[2..0] Current puncture rate identification
1
2
3
LK
(1) synchro found,
(0) searching puncture rate
4
PRF
(1) puncture rate found,
(0) searching puncture rate
5
unused set to (0)
6
unused set to (0)
7
CF
(1) carrier found, (0) searching carrier
REGISTER HEX 09
PUNCTURE RATE ENABLE (R/W)
Reset Value : Hex 10 (mode A)
0
E0
(1) Puncture 1/2 enabled, (0) disabled
1
E1
(1) Puncture 2/3 enabled, (0) disabled
2
E2
(1) Puncture 3/4 enabled, (0) disabled
3
E3
(1) Puncture 5/6 enabled, (0) disabled
4
E4
(1) Puncture7/8 (mode A), 6/7 (mode B)
(0) disabled
5
unused
6
7
REGISTER HEX 0A
RS REGISTER (R/W)
Reset Value : Hex B8
0 RS0 (1) output clock stopped during parity,
(0) continuous
1 RS1 Output clock polarity
2 RS2 (1) all synchro words are Hex47,
(0) synchro inversion disabled
3 RS3 Write error bit
4 RS4 Descrambler on (1), off (0)
5 RS5 Reed-Solomon on (1), off (0)
6 RS6 Normal operation (0), Reed-Solomon
correction bytes to output (1)
7 RS7 De-interleaver on (1), off (0)
STV0196B
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