ST QAMi5107 User Manual

QAMi5107

Low-cost QAM demodulator and MPEG2 decoder SOC

for set-top boxes

Data Brief

Features

■ ITU-T J.83 A/C, DVB-C, TSMF compliant

■ Full video and audio decoding features

IB_IN_P

IB_IN_M

GPIO/AGC1

GPIO/AGC2

GPIO/LOCK

GPIO/IT

GPIO/SCLT

GPIO/SDAT

GPIO/CS0

GPIO/CS1

NRESET

JTAG

ADC

AGC and

delayed AGC

GPIO switching matrix

to all blocks

Clock

generator

ST20 C1 core 200 MHz

4K ICache

DCU

2K SRAM

Int controller

4K DCache

Pre and post echo adaptive equalizer

Lock status

IT generator

I2C Repeater

FDMA

■ Comprehensive on-chip peripherals

■ Advanced security ready, compatible with

Initial demodulator

Adjacent filter

Symbol timing recovery

Nyquist filter - Digital AGC

Carrier recovery

Phase noise tracker

FEC Annex A and C

De-interleaver

Reed - Solomon FEC decoder

Descrambler

TSMF function

2D graphics Blitter display

MP@ML Video decoder

latest CA requirements.

Signal quality

estimator

BER Tester

Output

forma tter

JTAG controller

I²C interface

UART ( 2)

SmartCard 1

IR Tx/Rx

ILC

GPIO (4)

SSCs (2)

Comms block

TS_DATA[7:0]

M_SYNC

M_VAL

M_CKOUT

M_ERR

JTAG[4:0]

SCL

SDA

Comms peripherals

QAMi5107 Interconnect

PTI

TS in

ClockGen

Reset

System services

FMI

Flash

peripherals

PCM

player

Audio

DAC

AudioL AudioR

S/PDIF

player

S/PDIF

Audio

decoder

DVO

TV out

Video quad DACs

Video output

RGB / YC / CVBS

LMI

SDR/DDR

SDRAM

December 2006 Rev 1 1/6

For further information contact your local STMicroelectronics sales office.

www.st.com

Description QAMi5107

1 Description

The QAMi5107 provides an integrated demodulator/decoder solution for digital cable receivers for compressed video, sound and data services. A QAM (quadrature amplitude modulation) demodulator and FEC performs IF to MPEG-2 block processing of QAM carriers. The demodulated stream is then processed by video and audio decoders.

The device implements a fully unified SDR SDRAM based memory architecture that integrates the Omega2 video decoder cell together with a blitter engine and a multichannel DMA controller to provide enhanced performance for graphics and real-time stream transfers. Transfer of data such as pixmaps, audio streams, stills and PES can be performed efficiently using the QAMi5107 DMA.

A true-color mode provides OSD graphics allowing the display of RGB16 formats: RGB565, ARGB1555 and ARGB4444. This directly supports up to 65,536 colors in a region. Alpha blending by region or by pixel is available for mixing with video and background layers. The above feature set, guarantees a smooth user interface and high performance for demanding middlewares such as MHP™.

The QAMi5107 is the first single chip cable STB IC to combine a very low cost solution with advanced security features. DVB and ICAM descramblers together with a smart card interface ensure that all the major conditional access systems can be supported.

1.1 QAM Demodulator features

● Decodes ITU-T J.83-Annexes A/C and DVB-C bit streams

● Processes Japanese transport stream multiplex frame (TSMF)

● High-performance integrated A/D converter suitable for direct IF architecture in all QAM

(quadrature amplitude modulation) modes

● Supports 16, 32, 64, 128 and 256 point constellations

● Very low power consumption

● Full digital demodulation

● Variable symbol rates

● Front derotator for better low symbol rate performance and relaxed tuner constraints

● Integrated matched filtering

● Robust integrated adaptive pre and post equalizer

● On-chip FEC A/C with ability to bypass individual blocks

● 10 programmable GPIO

● Two AGC outputs suitable for delayed AGC applications (sigma-delta outputs)

● Integrated signal quality monitors, plus lock indicator and interrupt function mapped to

GPIO pin

● Improved signal acquisition

● System clock generated on-chip from quartz crystal

● Low frequency crystal operations 4, 16, 25 - 30 MHz

● 4 I²C addresses

● Easy control and monitoring via 2-wire fast I

C bus

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