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LSI™ StarPro2704 (SP2704) Multicore Media and Baseband Processor
Multicore Done Right™
Product Brief
F e a t u r e s
n Four StarCore® SC3400e DSP
subsystems at 750 MHz:
–
Enhanced instruction set for voice,
video, and cellular baseband
applications
– 16 MAC DSP engines
– 256-KB local RAM
– 32-KB L1 instruction cache
– 32-KB L1 data cache
– 512-KB L2 cache
– Two dedicated 2-channel DMA
controllers
n Dual-core ARM11 MP™ RISC
processors at 375MHz:
–
64-KB instruction cache per core
– 64-KB data cache per core
– 512-KB local memory
n Ultrahigh bandwidth DSP bus matrix
as a system interconnect for the
media processing functional blocks:
–
128-bit, multilayer ARM® AXI™ buses
that operate at half the DSP subsystem
clock rate
– High throughput with high availability
and low latency
n Hardware assist for wireline speed IP/
UDP or proprietary head processing
(verify and classify):
–
IPV6 supported
n 6-MB shared system memory with
error detection and correction:
–
Unified memory space provide both
instruction and data store
–
Banked implementation maximizes
throughput and minimize contention
–
Twelve banks allow for 12 simultaneous
transactions
n Error correction coding (ECC) on all
memories except ARM core memories
that support parity detection
Overview
The SP2704 media and baseband
processor is the third generation
of LSI multicore DSP and RISC CPU
platforms based on StarCore DSPs.
Representing the latest media and
baseband processor in the multicore
processor portfolio from LSI,
the SP2704 targets a wide range of
next-generation wireless, wireline, and
enterprise infrastructure applications
with high channel density, optimal
cost, and power efficiencies.
This heterogeneous computing platform is
optimized for low-power and high density
applications, enabling very high channel densities
for media and basestation applications.
The SP2704 is complemented by the LSI
Media Processing Suite, a comprehensive
software library optimized for high density,
multi-channel applications. The library
includes wireless and wireline audio codecs,
video codecs, echo cancellers and other
voice quality enhancement (VQE) modules,
IP packet processing, and a flexible and highly
efficient media processing engine.
A packet processing subsystem, based ARM11
MP processors, performs the processing and
routing of IP packets, providing many system
control plane options. Complementing the
large shared system memory, full support
for external memory is provided using DDR3
memory controller. A robust peripheral set
includes PCIExpress®, Serial Rapid I/O (sRIO),
TDM, and Ethernet interfaces. The DSP subsystems,
ARM subsystem, system memory,
and I/O are connected through a high-performance
bus matrix based on a multilayer ARM
AXI host bus. This bus matrix is effectively a
crossbar switch, providing more than 144-GB/s
of aggregate throughput.
n Two 10/100/1000/2500-Mb/s Ethernet
MACs:
–
Supports 4-wire SGMII interfaces
– IEEE® 802.3u compliant
– Supports MDIO interface
– 1000BASE-KX compliant
n TDM processing block supports six
serial ports for multiplexing and
demultiplexing TDM traffic:
–
Direct interface to H.110 and ST-BUS (1X
or 2X compatible) compliant devices,
T1/E1 framers, and more than one
concentration highway interface (CHI)
on many LSI devices
– Support for up to 256 time slots per TDM
highway
– Maximum input clock rate of 124.8 MHz
and output bit clock rate of 62.4 MHz
– Two dedicated DMA channels (one input,
one output) that support each serial port
n Two 2-channel DMACs for efficiency in
moving data among the memory and
peripherals
n Coprocessor connectivity ports for
high-speed direct access to other SP2704
devices or coprocessors, or alternate
function as host interface port:
–
10-Gb/s x2 PCIe® Gen 2 interface
(two 5 Gb/s lanes)
– 10-Gb/s x4 sRIO interface (four 3.125-Gb/s
lanes) or alternative configuration as two
independent x1 SRIO interfaces
– PCIe Gen 2 interface (two 5-Gb/s lanes)
n 32-bit DDR3 external memory interface
accessible by the DMA controllers and
processors
n Two IEEE 1149.1-compliant JTAG ports
for on-chip emulation of the CPU and
DSP subsystems
n 21 mm x 21 mm package with 0.8-mm
ball pitch
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