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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QAMi5107 Description
● Additional I
2
C 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,
SRAM
● Unified memory interface
– Up to 166 MHz,16-bit wide SDRAM interface and 133 MHz DDR interface
● Programmable flash memory interface
– 4 separately configurable banks, 8/16-bits wide
– SRAM, peripheral, flash, SFlash™ support
– Support for low cost DVB-CI
● Programmable transport interfaces (PTI)
– single transport stream input
– support for DVB transport streams
– integrated DVB, ICAM descramblers
● MPEG2 MP@ML video decoder
– Fully programmable horizontal and vertical SRCs
● Graphics/display
– 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.
● PAL/NTSC/SECAM encoder
– 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
■ Audio subsystem
– 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
■ Central DMA controller
4-Kbyte data cache, 2-Kbyte
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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 I²C /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 LMI
Smartcard
Cable
Tuner
ST8024
E2 PROM
IF
TSOut
TSIn
PIO
2
C
I
Audio L/R
QAMi5107
Video
RGB, YC, Cvbs
Tx/Rx
IR
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QAMi5107 Revision history
3 Revision history
Table 1. Document revision history
Date Revision Changes
20-Dec-2006 1 Initial release.
5/6
Revision history QAMi5107
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