STV0498
DOCSIS 2.0+ cable modem chip with channel bonding
Data Brief
Features
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High performance ST40 32-bit RISC CPU Code authentication mechanism embedded Three QAM demodulators with FECs Additional TS input DOCSIS 2.0 MAC and PHY Supports downstream channel bonding, compatible with DOCSIS 3.0 specification
TSin TSout
Single-Stream or Multi-Stream CableCARD
STV0498
CableCARD Interface
BOOTROM
EMI/EMPI LMI Memory interfaces
Flash MPX Cable CARD SRAM SDRAM DDR
Supports SCTE-55 PHY parts 1 and 2 Four-input stream merger Multi-Stream CableCARD interface
TSmerger
Transpor t
CPU DCache ICache
JTAG IRQs
Local memory interface USB 2.0 interface (includes PHY) Configurable GPIO Flexible multi-channel DMA JTAG/TAP interface Special Isolate mode allows fully independent DOCSIS and video operations Glue-less interfacing to ST decoder devices Full toolset support 23mm x 23mm PBGA, 386+36 pins, 1mm pitch Pb-free, RoHS (2002/95/EC) compliant.
Frontend control Upstream interface Downstream interface QAM (3 off)
3
STBUS
Ethernet MII and reduced MII interfaces
Clockgen PIO UART SSC x 6 Services Reset Clocks
QPSK/ QAM
Integrated cable interface Ethernet USB 2.0 I2C bus F DM A Interfaces MII USB I2C
Description
The STV0498 is a cable front-end solution for interactive and PVR set-top boxes. Built around a powerful 450-DMIP processor there are three QAM demodulators with FEC, a DOCSIS modem supporting full DOCSIS2.0 operations and channel bonding up to 120 Mbit/s. The STV0498 supports both IPV4 and IPV6 protocols. Ethernet and USB2.0 interfaces provide low-cost connections to the host computer.
SPI
Applications
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DOCSIS 2.0+ cable modem module Interactive cable set-top box eMTA terminal.
Februar y 2007
CD00152563 Rev 1
DOCSIS 2.0 + MAC
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www.st.com 4
For further information contact your local STMicroelectronics sales office.
Applications
STV0498
1
Applications
The STV0498 kit, when accompanied with a back-end decoder, provides a complete low-cost solution for interactive cable set-top boxes. The STV0498 has been designed to work as a kit with an analog front-end companion chip, the STV0130. This analog chip does the analog-digital conversion for the QAM signal input and the digital-analog conversion for the DOCSIS return path whilst the STV0498 does the digital operations. The STV0498 performs downstream and upstream operations for video and data. Three high-performance QAM/FEC modules demodulate and correct the cable signals to be sent either to a stream merger for video application or to the DOCSIS media access controller (MAC) for data flow. The forward error correction (FEC) blocks support the ITU-T J83 Annex A, B and C specification. The demodulators support square constellation from the QPSK used in legacy out-of-band (SCTE-55 parts 1 and 2) to QAM 256 and non-square constellation such as QAM 32 and QAM 128. The Japanese transport stream multiplex (TSMF) is also supported. The merged video stream is compatible with Multi-Stream CableCARD. This stream is then sent to a standard video decoder. Up to three video channels can be received simultaneously. The DOCSIS subsystem is fully compatible with the DOCSIS 2.0 specification and supports downstream channel bonding, compatible with the DOCSIS 3.0 specification, bringing the data rate up to 120 Mbit/s. Up to 16 QOS channels can be supported simultaneously. The STV0130 analog block provides direct connection to the upstream power amplifier. All DOCSIS operations are controlled by a high performance CPU running the OS21 operating system. Integrated peripheral blocks (the Ethernet and USB interfaces, for example) provide low-cost connections between the DOCSIS modem and the host computer. MPX is a primary connection mode between the STV0498 and ST decoder chips. Several modes of operations are available, from a stand-alone mode to a fully embedded solution with the back-end device. Figure 1.
R J1 1 RJ45
Typical application
SDRAM / DDR SLIC/ CODEC PHY STV0130 STLC1502 VoIP engine MII Local memor y LMI I2C STB71xx STB Host Audio L/R CVBS Downst ream interface Upstream interface SPI control interface PGA LMI Y/C MII TS TS RESET EMI USB MAC and PHY USB 2.0 SDRAM / DDR Flash FMI/ EMPI TS TS PIO HDMI YPbPr SPDIF SATA USB IR HDD USB 2.0 IR
L/R audio CVBS S-video HDMI YPbPr S/PDIF
Silicon tuner Silicon tuner Silicon tuner
ADC1 ADC2 ADC3 DAC
STV0498
Diplex filter
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CD00152563
STV0498
Revision history
2
Revision history
Table 1.
Date 16-Feb-2007
Document revision history
Revision 1 Initial release. Changes
CD00152563
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STV0498
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