STiH225
JTAG
STB peripherals I/O
Digital video ED/SD out
Resets Analog out
Clocks
Modes
PCM I/O
S/PDIF out External interrupts
Clock Gen
System serv
Peripherals
SSC
UART
ILC
PWM
Infrared
Smartcard
Connectivity
Transport
Security
Audio I/O
Display Video I/O
Audio decoder
Video decoder
EMI
PCI
Serial
LMI
System
interfaces
CPU/FPU
STBus
Triple FDMA
Bdisp Blitter
USB 2.0
eSATA
Ethernet
IF in
RF out
DDR2
Serial Flash
Memory
Flash, SFlash
NOR, NAND
PCM reader
PCI Peripherals
PCM players
DACs
Flash
Analog video ED/SD out
GPIO
DOCSIS 2.0 + MAC
transceiver
Cable
ITU-T J.83 A/B/C
MCARD
Interactive HDTV cable STB processor with integrated front-end
Data brief
Features
■ DOCSIS/EuroDOCSIS 2.0 cable modem with
support for DOCSIS 3.0 down-stream channel
bonding
■ Integrates three cable receiver/demodulators
with 12-bit ADC IF interface and one cable
transmitter with 14-bit DAC output
■ Dual core architecture
■ Linux
■ Firmware-based multi-standard HD video
■ Firmware-based multi-standard audio
®
compatible
decoder for:
– H.264 / MPEG-4 AVC HP@L4
– MPEG-2 MP@HL
– SMPTE VC-1 AP@L3
processor for:
– MPEG-1 I/II/III (MP3), MPEG-2 ACC (AAC-
LC)
– MPEG-4 HE AAC (aacPlus)
–Dolby
®
Digital (AC-3), Dolby Digital Plus
■ Firmware-based programmable transport
stream (PTI) processor
■ DVR support, and trick play modes
■ Dual display HD and SD
■ 2D Blitter graphics with video mosaic support
■ Multi-level layered security
■ Interfaces include USB, Ethernet, HDMI
TM
,
eSATA
■ Single port 10/100 fast Ethernet transceiver
Description
The STiH225 is an interactive HDTV set-top box
device, with an embedded DOCSIS cable modem
capable of providing DOCSIS set-top gateway
(DSG), interactive multimedia and internet access
for the digital cable market. STiH225 device can
be used as a mini gateway for the home network.
November 2011 Doc ID 022120 Rev 3 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
1
Introduction STiH225
1 Introduction
The STiH225 is a highly integrated system-on-chip (SoC) designed to meet the demanding
need of the interactive cable set-top box market. The STiH225 integrates all the major
system functions into a single device, and provides world leading, multi-layer, advanced
security technologies to protect valuable video and audio assets.
Features Benefits
Combines a cable transceiver and ITU-T J.83
A/B/C demodulator with STB decoding and
display functions
Integrates EuroDOCSIS/DOCSIS 2.0 cable
modems with support for DOCSIS 3.0 downstream channel bonding
Serial Flash-based secure boot and code
storage; 35 mm x 35 mm x 2.30 mm PBGA
package
ST40 applications CPU,
32 K I cache, 32 K D cache
STMicroelectronics' DELTA video decoding
system with ST231 processor
Dual USB 2.0 hosts, dual Ethernet MAC with
one PHY compatible with MII/RMII and GMII
Advanced 2D graphics and display subsystem Allows visually appealing user interfaces and
This highly integrated SoC helps to reduce board
area and manufacturing cost, allowing costeffective and small-size STBs to be designed for
ITU-J.83 A/B/C (DVB-C, SARFT, SCTE-40)
networks
The embedded EuroDOCSIS and DOCSIS cable
modems are capable of providing DOCSIS set-top
gateway, interactive multimedia and internet
access for the digital cable market
Enables further BOM optimization and cost
reduction of advanced decoding SD STBs
Superscalar performance from a single CPU core,
using standard tools and operating systems (Linux)
Decoding of advanced standard definition MPEG2,
H.264 and VC-1/WMV9 streams, with the
performance and flexibility for web-based content
decoding such as Flash, DivX, MJPEG, XviD and
Real
Extensive high-speed connectivity for the widest
range of STB peripherals, such as Flash drives,
external HDDs, home network controllers (for
example MoCA, Wi-Fi), memory cards
video-rich navigation to be offered to consumers,
while high-quality progressive output can be
watched on the latest displays
2/4 Doc ID 022120 Rev 3
STiH225 Revision history
2 Revision history
Table 1. Document revision history
Date Revision Changes
14-Oct-2011 1 Initial release.
24-Oct-2011 2 Minor content changes.
– Updated the reference to DVB-C to ITU-T J.83 A/B/C in the block
11-Nov-2011 3
diagram on page 1
– Updated the reference to DVB-C to ITU-J.83 A/B/C (DVB-C,
SARFT, SCTE-40) in the Features & Benefits table on page 2
Doc ID 022120 Rev 3 3/4
STiH225
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4/4 Doc ID 022120 Rev 3
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