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

A

Z0

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

16

Comms
peripherals

QAMi5107 Interconnect

PTI

TS in

ClockGen

Reset

System services

FMI

16

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

16

SDR/DDR

SDRAM

December 2006 Rev 1 1/6

For further information contact your local STMicroelectronics sales office.

www.st.com

6

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

2

C bus

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