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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: - - - - DIRECTVTM and DVBS QPSK DVBS2 QPSK, 8PSK and 16APSK Digital Nyquist root filter
Interfaces - Dedicated 27 MHz clock generation for back-end decoder - I2C serial bus interface - JTAG interface - boundary scan - 2 DiSEqCTM 2.x interfaces - GPIOs and interrupt lines - Monitoring through I2C serial interface Technology - 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.
With 0.20, 0.25, 0.35 excess bandwidth factors. - DVBS or DIRECTVTM - 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 DIRECTVTM legacy per FEC - Legacy DVB-S - DVB-S2 Transport stream management - - - Dual data to MPEG decoder Single ACM data to microprocessor DVB-S2 framing
December 2006
Rev 1
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For further information contact your local STMicroelectronics sales office.
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 [sdat1, sclt1] [sda,scl] agc_rf1 [Im1,Ip1] [Qm1,Qp1] [d1<0>, clkout1, strout1, d/p1, error1] clkout_27
STi710X
xtal_i 27MHz
STB6100 [sdat2, sclt2] agc_rf2 [Im2,Ip2] [Qm2,Qp2] [d2<0>, clkout2, strout2, d/p2, error2]
27MHz
diseqc2_o diseqc2_i
Possible broadcast configurations are:

dual DVBS or dual DIRECTVTM legacy decoding with dual TS output, dual DVBS2 decoding with dual TS output, DVBS or DIRECTVTM legacy and DVBS2 decoding with dual TS output.
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STV0900 Figure 2. STV0900 ACM application block diagram
Application block diagrams
STB6100
STV0900 [sdat1, sclt1] [sda,scl] agc_rf1 [d1<7:0>, clkout1, strout1, d/p1, [Qm1,Qp1] error1] [Im1,Ip1] xtal_i 27 MHz [SOFcount, SOF] clkout_27
STiXXXX
DiSEqC 2.0
diseqc1_o diseqc1_i
Possible configurations can be:

single DVBS2 ACM decoding, single DVBS2 ACM with single DVBS or DIRECTVTM legacy (2nd tuner not shown).
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Revision history
STV0900
2
Revision history
Table 1.
Date 21-Dec-2006
Document revision history
Revision 1 Initial release. Description
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STV0900
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