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QAMI5107
Low-cost QAM demodulator and MPEG2 decoder SOC for set-top boxes
Data Brief
Features

Comprehensive on-chip peripherals Advanced security ready, compatible with latest CA requirements.
ITU-T J.83 A/C, DVB-C, TSMF compliant Full video and audio decoding features
IB_IN_P
Initial demodulator ADC Adjacent filter Symbol timing recovery Nyquist filter - Digital AGC AGC and delayed AGC
GPIO switching matrix
IB_IN_M GPIO/AGC1 GPIO/AGC2 GPIO/LOCK GPIO/IT
Signal quality estimator BER Tester
Carrier recovery Phase noise tracker Pre and post echo adaptive equalizer
GPIO/SCLT GPIO/SDAT GPIO/CS0 GPIO/CS1 NRESET A Z0
Lock status IT generator I2C Repeater
FEC Annex A and C De-interleaver Reed - Solomon FEC decoder Descrambler TS_DATA[7:0] TSMF function
M_SYNC
to all blocks
Clock generator
Output formatter
M_VAL M_CKOUT M_ERR
JTAG controller IC interface FDMA MP@ML Video decoder 2D graphics Blitter display UART (2) IR Tx/Rx ILC SmartCard 1 GPIO (4) SSCs (2) Comms block 16
JTAG[4:0] SCL SDA
ST20 C1 core 200 MHz JTAG DCU 4K ICache 2K SRAM Int controller 4K DCache
Comms peripherals
QAMI5107 Interconnect
PTI
ClockGen Reset System services FMI
PCM player Audio DAC
16
TV out S/PDIF player Audio decoder
16 LMI
SDR/DDR SDRAM
Video quad DACs
TS in
Flash peripherals
AudioL AudioR
S/PDIF
DVO
Video output RGB / YC / CVBS
December 2006
Rev 1
1/6
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For further information contact your local STMicroelectronics sales office.
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 MHPTM. 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 IC addresses Easy control and monitoring via 2-wire fast I2C bus
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QAMI5107

Description Additional I2C bus (I2C repeater) dedicated to tuner control for minimum tuner disturbance Programmable clock derived from system clock and available for external use Parallel and serial output interfaces, with DVB common interface support On chip voltage regulator CMOS technology, 1.0 V operation
1.2
Decoder features
Enhanced ST20 32-bit VL-RISC CPU - 200-MHz, single cycle cache, 4-Kbyte instruction cache, 4-Kbyte data cache, 2-Kbyte
SRAM

Unified memory interface - - - - Up to 166 MHz,16-bit wide SDRAM interface and 133 MHz DDR interface 4 separately configurable banks, 8/16-bits wide SRAM, peripheral, flash, SFlashTM support Support for low cost DVB-CI single transport stream input support for DVB transport streams integrated DVB, ICAM descramblers Fully programmable horizontal and vertical SRCs 3 display planes 8 bpp CLUT graphics, 256 x 30 bits (AYCbCr) CLUT entries, 16 bpp true color graphics, RGB565, ARGB1555, ARGB4444 formats. Link list control Alpha blending, antialiasing, antiflutter, antiflicker filters 2-D paced blitter engine with fill function Blitter based display compositor Digital video output: compliant with CCIR 601/CCIR 656. RGB, CVBS, Y/C and YUV outputs with four 10-bit DACs outputs. RGB/CVBS or YUV/CVBS or YC/CVBS Encoding of CGMS, Teletext, WSS, VPS, closed caption MPEG-1 layers I/II decoding Simultaneous MPEG audio decode and output of Dolby streams on S/PDIF IEC958/IEC1937 digital audio output interface Integrated stereo audio DAC system Programmable flash memory interface
Programmable transport interfaces (PTI) - - -

MPEG2 MP@ML video decoder - - - - - - - Graphics/display
PAL/NTSC/SECAM encoder - -
Audio subsystem - - - -
Central DMA controller
3/6
Applications
QAMI5107 On-chip peripherals - - - - - - - 2 ASCs (UARTs) with Tx and Rx FIFOs 3 banks of 8-bit and 1 bank of 7-bit parallel I/O 1 smartcard interface and clock generator 2 SSCs for IC /SPI master/slave interfaces Infrared transmitter/receiver Integrated VCXO Low-power / RTC / watchdog controller
JTAG/TAP interface
2
Applications
The QAMI5107 is targeted at worldwide cable markets that use ITU-T J83 Annexes A/C or DVB-C specifications. It provides a single chip solution for the following functions: QAM demodulation, FEC, transport, descrambling, MPEG a/v decoding, CPU, graphics and peripherals. Few external components are required to realize a complete STB solution resulting in very low BOM cost. The QAMI5107 is perfectly suited for digital conversion of existing analog networks as well as providing advanced security enhancements and system cost down for designs currently using the QAMi5516 and STx5105/STx5107. Figure 1. QAMI5107 application diagram - low-cost Cable STB
Flash
SDRAM
FMI Cable Tuner IF
LMI
Audio L/R TSOut
TSIn
QAMI5107
Video RGB, YC, Cvbs
PIO Smartcard ST8024 I2C E2 PROM
Tx/Rx IR
4/6
QAMI5107
Revision history
3
Revision history
Table 1.
Date 20-Dec-2006
Document revision history
Revision 1 Initial release. Changes
5/6
Revision history
QAMI5107
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