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STi7100
Low cost HDTV set-top box decoder for H.264/AVC and MPEG-2
Data Brief
Features
■ The STi7100 is a single-chip, high-definition
STB decoder including:
– ST40 CPU core, 266 MHz
– dual ST231 CPU cores for audio and video
decoding, both 400 MHz
– transport filtering and descrambling
– video decoder: H.264/AVC and MPEG-2
– graphics engine and dual display:
high-definition (HD) and
standard definition (SD)
– audio decoder
ST40 core 266 MHz
UDI
MMU
16 K Icache
Int. control
32 K Dcache
32
Video
DDR
SDRAM
32
LMI
System
LMI
5 x 2-ch
PCM out
2-ch
PCM in
Audio decoder
and interfaces
AudioL
AudioR
Audio
DACs
ST231
core
S/PDIF
■ The STi7100 also features the following
embedded interfaces:
–USB 2.0
– DVI/HDMI output
– digital audio and video auxiliary input
– modem
– serial ATA
SD
video in
interface
Digital
video input
Serial
ATA
USB
2.0
2x I/F
SmCard
6x GPIO
Peripheral I/O
and external interrupts
IR
ILC
interface
UARTs
Tx/Rx
MAFE
4x
PWM
3x
SSCs
STBus
GDP
PDES
TSmerger/router
TSIN1
TSIN0
NRSS-A
PTI
TS I/O
CP
generator
and system
services
Clock
FDMA
DiSEqC
DAA
Video decoder
H.264/AVC,
MPEG2
ST231
core
DVI-HDCP
HDMI
TMDS main video
output (HD)
2D gamma
blitter
Output stage
Main video
output (HD)
YPbPr
CUR
DACs
Display
compositor
DENC
DACs
Aux video
output (SD)
YC/CVBS
GDP
LMU
Main video
display
Aux video
display
EMI
Flash
peripherals
December 2006 Rev 2 1/9
For further information contact your local STMicroelectronics sales office.
www.st.com
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Description STi7100
1 Description
The STi7100 is a new generation, high-definition set-top box decoder chip, and provides
very high performance for low-cost HD systems. With enhanced performances over the
STi7710, it includes an H.264/AVC decoder for new low-bitrate applications, as well as dualdecode MPEG-2 capability.
Based on the Omega2 (STBus) architecture, this system on chip is a full back-end
processing solution for digital terrestrial, satellite and cable high-definition set-top boxes
compliant with ATSC, DVB, DIRECTV, DCII, OpenCable and ARIB BS4 specifications.
The STi7100 demultiplexes, decrypts and decodes a single HD or SD video stream with
associated multichannel audio. Video is output to two independently formatted displays: a
full resolution display intended for a TV monitor, and a downsampled display intended for a
VCR, or alternatively a second SD TV. Connection to a TV or display panel can be via an
analog component interface or a copy protected DVI/HDMI interface. Composite outputs are
provided for connection to the VCR with Macrovision protection. Audio is output with
optional PCM mixing to an S/PDIF interface, PCM interface or via integrated stereo audio
DACs.
Digitized analog programs can also be input to the STi7100 for reformatting and display.
The STi7100 includes a graphics rendering and display capability with a 2D graphics
accelerator, two graphics planes and a cursor plane. A dual display compositor provides
mixing of graphics and video with independent composition for each of the TV and VCR
outputs.
The STi7100 includes a stream merger to allow five different transport streams from
different sources to be merged and processed concurrently. Applications include DVR time
shifted viewing of a terrestrial program while acquiring an EPG/data stream from a satellite
or cable front end.
The flexible descrambling engine is compatible with required standards including DVB, DES,
AES and Multi2.
The STi7100 embeds a 266 MHz ST40 CPU for applications and device control. A dual
DDR1 SDRAM memory interface is used for higher performance, to allow the video decoder
the required memory bandwidth for HD H.264 decoding and sufficient bandwidth for the
CPU and the rest of the system. A second memory bus is also provided for flash memory
storing resident software and for connection of peripherals.
A hard-disk drive (HDD) can be connected either to the serial ATA interface or as an
expansion drive via the USB 2.0 port. The USB port can also be used to connect to a
DOCSIS 2.0 CM gateway for interactive cable applications.
The STi7100 is supported by STMicroelectronics’ STAPI software, and is compatible with
several other related devices such as the STi7109.
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