STV0900BAB - STMICROELECTRONICS

Data Brief

For further information contact your local STMicroelectronics sales office.

December 2006 Rev 1 1/5

STV0900

Multistandard advanced dual demodulator

for Satellite Digital TV and Data services set-top boxes

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

TM and DVBS QPSK

– DVBS2 QPSK, 8PSK and 16APSK

– Digital Nyquist root filter

– 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

■Interfaces

– Dedicated 27 MHz clock generation for

back-end decoder

–I

2C 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.

www.st.com

Application block diagrams STV0900

2/5

1 Application block diagrams

Figure 1. STV0900 dual broadcast application block diagram

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.

xtal_i

[Im1,Ip1]

[Qm1,Qp1]

[sdat1, sclt1]

STB6100

diseqc1_o

diseqc1_i

agc_rf1

[sda,scl]

[d1<0>,

clkout1,

strout1,

d/p1,

error1]

STi710X

STV0900

clkout_27

DiSEqC 2.0

27MHz

[Im2,Ip2]

[Qm2,Qp2]

[sdat2, sclt2]

STB6100

agc_rf2

27MHz

[d2<0>,

clkout2,

strout2,

d/p2,

error2]

diseqc2_o

diseqc2_i

STV0900 Application block diagrams

3/5

Figure 2. STV0900 ACM application block diagram

Possible configurations can be:

●single DVBS2 ACM decoding,

●single DVBS2 ACM with single DVBS or DIRECTVTM legacy (2nd tuner not shown).

xtal_i

[Im1,Ip1]

[Qm1,Qp1]

[sdat1, sclt1]

STB6100

diseqc1_o

diseqc1_i

agc_rf1

[sda,scl]

[d1<7:0>,

clkout1,

strout1,

d/p1,

error1]

STiXXXX

STV0900

clkout_27

DiSEqC 2.0

27 MHz

[SOFcount,

SOF]

Revision history STV0900

4/5

2 Revision history

Table 1. Document revision history

Date Revision Description

21-Dec-2006 1 Initial release.

STV0900

5/5

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