STi5200
Low-cost SDTV set-top box decoder for H.264/AVC and MPEG-2
Data Brief
Features
■ The STi5200 is a single-chip, standard-
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
5 x 2-ch
ST40 core 266 MHz
UDI
MMU
16 K Icache
Int. control
32 K Dcache
32
DDR
SDRAM
Video
LMI
System
LMI
32
PCM out
2-ch
PCM in
Audio decoder
and interfaces
ST231
core
AudioL
AudioR
Audio
DACs
S/PDIF
– graphics engine and dual display:
enhanced definition ED (480p/576p) and
standard definition SD (480i/576i)
– audio decoder
■ The STi5200 also features the following
embedded interfaces:
–USB 2.0
– digital audio and video auxiliary input
– modem
SD
video in
Digital
video input
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
TSmerger/router
TSIN0
NRSS-A
PDES
PTI
TSIN1
TS I/O
CP
generator
and system
services
Clock
FDMA
DiSEqC
DAA
Video decoder
H.264/AVC,
MPEG2
ST231
core
2D gamma
blitter
Output stage
Main video
output (ED)
CUR
DACs
YPbPr
Display
compositor
DENC
DACs
Aux video
output (SD)
YC/CVBS
GDP
LMU
Main video
display
Aux video
display
EMI
Flash
peripherals
February 2007 Rev 1 1/7
For further information contact your local STMicroelectronics sales office.
www.st.com
1
Description STi5200
1 Description
The STi5200 is a new generation, standard-definition set-top box decoder chip, which
provides very high performance for low-cost systems. With enhanced performance over the
STi7710, it includes an H.264/AVC decoder for new low-bitrate applications, and 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 standard-definition set-top boxes
compliant with ATSC, DVB, DIRECTV, DCII, OpenCable and ARIB BS4 specifications.
The STi5200 demultiplexes, decrypts and decodes SD video streams 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.
Connection to a TV or display panel is through an analog component 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 through integrated stereo
audio DACs.
Digitized analog programs can also be input to the STi5200 for reformatting and display.
The STi5200 can render and display graphics, and has 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 STi5200 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.
2/7
STi5200 Applications
2 Applications
The STi5200 has an embedded 266 MHz ST40 CPU for applications and device control.
DDR1 SDRAM memory is used for higher performance, to allow the video decoder the
required memory bandwidth for H.264 decoding and sufficient bandwidth for the CPU and
the rest of the system. A second memory bus is provided for flash memory storing resident
software and for connecting peripherals.
A hard-disk drive (HDD) can be connected as an expansion drive using 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 STi5200 is supported by STMicroelectronics’ STAPI software.
Figure 1. Low-cost satellite SD set-top box
PTSN
STV0299
+STB6000
QPSK Rx
MAFE I/F
Transport
stream in
2 x 128 Mbit
STi5200
Smart
cards
IR Tx/Rx
DDR1
RGB/YPbPr
CVBS/YC
VCR
Flash
3/7
Applications STi5200
Figure 2. Low-cost cable SD set-top box with return channel
CableCARD
interface
™
Flash
2 x 128 Mbit
DDR1
Broadcast
IB data/
OOB
Tuner and
SAW filter
Tuner and
SAW filter
STVi498
EMI
Cable
front end
Diplex
filter
Upstream
PGA
QAM/QPSK
transceiver
IR
Tx/Rx
STi5200
RGB/YPbPr
CVBS/YC
RS232
Smart
cards
Figure 3. Low-cost dual satellite and terrestrial SD set-top box with HDD
IR
Flash
DDR1
Tx/Rx
VCR
Tuner
PSTN
STV0299
+STB6000
QPSK Rx
STV0370
8VSB Rx
MAFE I/F
EMI
DVB -CI
Smart
cards
STi5200
RGB/YPbPr
RS232
USB 2.0
HDD
(expansion)
4/7
STi5200 Applications
Figure 4. Low-cost SD IP-TV set-top box with HDD
IR
Flash
DDR1
EMI
Tx/Rx
Ethernet
RJ45
Ethernet
controller
STi5200
Smart
cards
RGB/YPbPr
RS232
USB 2.0
HDD
(expansion)
5/7
Revision history STi5200
3 Revision history
Table 1. Document revision history
Date Revision Changes
16-Feb-2007 1 Initial release.
6/7
STi5200
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