Data Brief
For further information contact your local STMicroelectronics sales office.
February 2007 CD00152563 Rev 1 1/4
4
STV0498
DOCSIS 2.0+ cable modem chip with channel bonding
Features
!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
!Supports SCTE-55 PHY parts 1 and 2
!Four-input stream merger
!Multi-Stream CableCARD interface
!Local memory interface
!USB 2.0 interface (includes PHY)
!Ethernet MII and reduced MII interfaces
!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.
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.
Applications
!DOCSIS 2.0+ cable modem module
!Interactive cable set-top box
!eMTA terminal.
Reset
Clocks
MII
I2C
USB
JTAG
IRQs
Flash
MPX
Cable
SRAM
SDRAM
DDR
DOCSIS 2.0 + MAC
Integrated
cable interface
CARD
TSout EMI/EMPI
LMI
Memory
I2C bus
USB 2.0
Ethernet
Interfaces
STBUS
FDMA
SSC x 6
PIO
UART
Clockgen
Services
interfaces
TSin
QAM
CPU
DCache
ICache
Single-Stream
or Multi-Stream
CableCARD
TSmerger
Interface
Transport
CableCARD
BOOTROM
Up-
3
STV0498
(3 off)
stream
interface
Down-
stream
interface
QPSK/
QAM
SPI
Front-
end
control
www.st.com
Applications STV0498
2/4 CD00152563
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. Typical application
STB71xx
Flash
PGA
Diplex
filter
LMI
EMI
MII
SDRAM / DDR
STB Host
RESET
HDD
YPbPr
SDRAM / DDR
IR
USB
SPDIF
HDMI
Y/C
CVBS
Audio L/R
MII
Local
memory
STLC1502
VoIP
engine
SLIC/
CODEC
PHY
RJ45
RJ11
USB 2.0
PIO
TS
TS
TS
TS
SATA
FMI/EMPI
I2C
STV0498
USB MAC
and PHY
LMI
ADC1
ADC2
ADC3
STV0130
Down-
stream
interface
Up-
stream
interface
SPI
control
interface
DAC
L/R audio
CVBS
S-video
HDMI
YPbPr
S/PDIF
USB 2.0
IR
Silicon
tuner
Silicon
tuner
Silicon
tuner
STV0498 Revision history
CD00152563 3/4
2 Revision history
Table 1. Document revision history
Date Revision Changes
16-Feb-2007 1 Initial release.
STV0498
4/4 CD00152563
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