BCM7315
®
SINGLE-CHIP SATELLITE SET-TOP BOX DECODER
FEATURES
•
All-Digital Satellite Receivers
- 1–45 Mbaud variable rate receiver
- Integrated 7-bit A/D converters
- Complies with DVB/DIRECTV
®
/Digicipher II™ FEC
Decoder
Data Transport Processor
- Support for DIRECTV
®
and MPEG transport streams
- DES/DVB descrambler
- Support for 64 PIDs and 64 section filters
- Support for play/record from/to hard disk
MPEG-ATSC Compliant Audio/Video Decoders
- MP@ML MPEG-2 video decoder
- Decode of MPEG Layer 1 and Layer 2 Audio
- Support for Dolby® AC-3 and compressed PCM
Broadcom Graphics Engine (BGE)
- Supports 3 Graphics, 1 x video and H/W cursor planes
- 2D video scaling support
- Integrated PAL/NTSC/SECAM encoder
- ITU-656 input support
MIPS32TM CPU Core @ 175 MHz
- MMU Support
- EJTAG debug support
IDE Host Adapter
- ATA5 command set, Ultra ATA/66 I/F
SUMMARY OF BENEFITS
•
Provides a cost-effective solution for direct broadcast satellite
•
(DBS) applications
Fully integrated QPSK receiver, MPEG-2 A/V decoder,
MIPSTM CPU and peripherals for complete set-top box
system
- Low cost solution for next generation set-top boxes
PVR capability enables personal viewing and scheduling,
video-on-demand (VOD), and VCR “trick mode” effects on
any video stream
- Encryption ensures copy protection of recorded
programming content
- Simultaneous support for record and playback
Advanced 2D graphics system allows applications such as
Internet browsers and electronic program guides to deliver
studio quality text and graphics on television monitors
Broadcom-developed device drivers enable rapid software
development cycle with support of industry-standard
operating systems
Subsystems are based on Broadcom’s field-proven
production-available technologies
•
•
•
•
•
•
•
•
•
BCM7315 Single-Chip System Block Diagram
Dual SmartCard
Flash
SDRAM
BCM3440
CMOS
Tuner
BCM7315
Dual Video
Output
Dual Audio
Output
PVR
OVERVIEW
IDE/
ITU-R656
I
2
S
IDE
Host
IFC
Satellite
Access/
ICAM
MPEG Xport
QPSK
Receiver
XPORT
SD-MPEG-2
Video
Decoder
Graphics
Video
Encoder
Video
DACs (4)
Video
Composite
S-Video
Channel 3/4
HSX
Audio
Left _p/n
Right _p/n
RF Modulator
MPEG/Dolby
Audio
Decoder
SPDIF
ISB DMA Clients:
IDE, USB, EBI
BME SDRAM Clients:
Xport, MPEG, Graphics
Audio, DMA
USB 1.1
Host
Controller
Audio
DACs
MIPS MMU (175 MHz)
Host
EBI
EJTAG
DDR-SDRAM
Controller
Peripheral
SRAM
ROM
(FLASH)
Test
ICE
16-bit DDR-DRAM
IR/uART
SPI/I
2
C/GPIO/PWM
SMARTCARD
The
BCM7315
is a satellite set-top box system on a single chip,
integrating Broadcom’s field-proven BCM4500 QPSK Demodulator
technology, as well as technology derived from Broadcom’s existing
cable products (such as the BCM7115 cable STB single-chip device).
The
BCM7315
is designed based on a unified memory architecture,
(UMA), utilizing 16-bit wide double data rate (DDR) memory for added
performance.
The
BCM7315
is a complete single chip that can decode transport
streams, delivered either via the external BCM3440 CMOS tuner or via
the IDE host I/F from an external hard disk drive, (or combination), and
display the resulting decoded audio and video on a television monitor
connected to the set-top box. A channel 3–4 RF modulator is also
included on-chip to further reduce system design complexity. The on-
chip video encoder supports NTSC/PAL and SECAM with optional
Macrovision 7.1 on the output.
The
BCM7315
includes Broadcom’s advanced 2D graphics engine,
offering true studio quality text and graphics with extremely efficient use
of memory and bandwidth
The
BCM7315
also incorporates a complete industry standard
MIPS32™ based microprocessor subsystem, including 8-KB Instruction
cache, 8-KB Data cache and 2-KB read ahead cache. Internal bridges to
memory and local busses provide support for external peripherals on-
chip as well as off-chip. A full range of peripheral devices are supported
on the
BCM7315,
including UARTs, dual ISO7816 smart card I/Fs,
GPIOs, counters/ timers, IR Tx/Rx, I2C and SPI controllers.
Broadcom
®
, the pulse logo, and
Connecting everything
®
are trademarks of Broadcom Corporation and/
or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the
property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2003 by BROADCOM CORPORATION. All rights reserved.
7315-PB02-R
12/29/03
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
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