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STV0900
Multistandard advanced dual demodulator
for Satellite Digital TV and Data services set-top boxes
Data Brief
Description
The STV0900 features a high speed DVB-S2 Forward Error Corrector (FEC) which is designed to handle
up to 180 Mega Channel bits per second at its input. To feed the FEC the STV0900 implements two
identical demodulators, each capable of handling QPSK legacy, DVBS2 constant coding and modulation
for satellite broadcast and Advanced Coding and Modulation for interactive services. The STV0900
supports mode switching on a frame basis without synchronization or data loss.
Features
■ Demodulation
– RF interfaces
– Each demodultor can handle:
–DIRECTV
– DVBS2 QPSK, 8PSK and 16APSK
– Digital Nyquist root filter
– With 0.20, 0.25, 0.35 excess bandwidth
factors.
– DVBS or DIRECTV
– DVBS2 broadcasting (CCM)
– DVBS2 adaptative (ACM)
■ Dual decoding
– Up to 180 Mega DVBS2 channel bits per
second (Mcbps) at input to FEC
– Up to 130 Mcbps DVBS or DIRECTV
legacy per FEC
– Legacy DVB-S
– DVB-S2
■ Transport stream management
– Dual data to MPEG decoder
– Single ACM data to microprocessor
– DVB-S2 framing
TM
and DVBS QPSK
TM
TM
■ Interfaces
– Dedicated 27 MHz clock generation for
back-end decoder
2
–I
C serial bus interface
– JTAG interface - boundary scan
– 2 DiSEqC
TM
2.x interfaces
– GPIOs and interrupt lines
– Monitoring through I
■ Technology
2
C serial interface
– 90 nm CMOS process
– Multi supply: 1.0 V core, 2.5 V analog,
3.3 V digital interfaces
– Power saving features
■ Package
– Exposed PAD LQFP 128 14x14, 0.4 pitch
– 4 layer PCB recommended.
December 2006 Rev 1 1/5
For further information contact your local STMicroelectronics sales office.
www.st.com
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Application block diagrams STV0900
1 Application block diagrams
Figure 1. STV0900 dual broadcast application block diagram
DiSEqC 2.0
STV0900
diseqc1_o
diseqc1_i
STB6100
STB6100
27MHz
[sdat1, sclt1]
agc_rf1
[Im1,Ip1]
[Qm1,Qp1]
xtal_i
[sdat2, sclt2]
agc_rf2
[Im2,Ip2]
[Qm2,Qp2]
STi710X
[sda,scl]
[d1<0>,
clkout1,
strout1,
d/p1,
error1]
clkout_27
[d2<0>,
clkout2,
strout2,
d/p2,
error2]
27MHz
Possible broadcast configurations are:
● dual DVBS or dual DIRECTV
● dual DVBS2 decoding with dual TS output,
● DVBS or DIRECTV
2/5
TM
legacy and DVBS2 decoding with dual TS output.
TM
legacy decoding with dual TS output,
diseqc2_o
diseqc2_i
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STV0900 Application block diagrams
Figure 2. STV0900 ACM application block diagram
STB6100
27 MHz
DiSEqC 2.0
STV0900
[sdat1, sclt1]
agc_rf1
[Im1,Ip1]
[Qm1,Qp1]
xtal_i
[SOFcount,
diseqc1_o
diseqc1_i
Possible configurations can be:
● single DVBS2 ACM decoding,
● single DVBS2 ACM with single DVBS or DIRECTV
STiXXXX
[sda,scl]
[d1<7:0>,
clkout1,
strout1,
d/p1,
error1]
clkout_27
SOF]
TM
legacy (2nd tuner not shown).
3/5
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Revision history STV0900
2 Revision history
Table 1. Document revision history
Date Revision Description
21-Dec-2006 1 Initial release.
4/5
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STV0900
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