鈥?/div>
鈥?High, medium, and low priority downstream queues
payload header suppression offloads system CPU,
giving higher overall system performance.
Extraction of bandwidth requests and DOCSIS MAC
management messages allows software to access these
messages without examining data packets.
Class-based queuing allows traffic prioritization:
鈥?High priority, low priority, request, and MAC management
upstream queues
Processes
400,000 packets
the
鈥?/div>
aggregate up toall upstream andper second in channels
over
downstream
鈥?/div>
鈥?/div>
Direct interface to:
DOCSIS 2.0 Advanced QAM
BCM3040 QAMLink
廬
TM
modulator (providing downstream data rates up to 100 Mbps)
鈥?BCM3140 QAMLink
廬
dual-channel DOCSIS 2.0 burst receiver
(providing upstream data rates up to 40 Mbps per upstream
channel)
Support for carrier class redundancy via timestamp
鈥?/div>
synchronization across multiple BCM3214 devices.
Supports high
rates for maximum utilization of
鈥?/div>
available cablepacketbandwidth.
plant
Out-of-band (OOB) generator for
鈥?/div>
BCM3352-based cable modems. messaging to
Can be remoted from
routing/classification
鈥?/div>
engine for distributed external(mini fiber node)
CMTS
Packet
鈥?/div>
to otherport provides a high-throughput data interface
network equipment via the standard IEEE
鈥?/div>
鈥?/div>
802.3z GMII Ethernet interface
PCI interface to external host CPU supports either 32-
bit or 64-bit operation at either 33 MHz or 66 MHz
PROPANE
TM
packet acceleration and Smart
Spectrum
TM
technologies for increased upstream
鈥?/div>
鈥?/div>
鈥?/div>
applications.
SPI Master Port Controls register interface to
BCM3040 and BCM3140 devices.
Packaged in an 841-pin, thermally-enhanced plastic
ball grid array.
Operates over industrial temperature range (鈥?0 to
+85 degrees C) PCI bus.
Typical Application Block Diagram
BCM3140
Dual Adv. TDMA
Receiver
Upstream
SDRAM
(keys and
reassembly)
Upstream
SDRAM
(PHS,
output
queues)
Upstream
Analog Inputs
BCM3140
BCM3140
Ethernet
Routing/
Classification
Engine
WAN
BCM3214
Advanced CMTS MAC
System
CPU
PCI Bus
Downstream
Analog Inputs
BCM3034
Downstream
Modulator
Downstream
SDRAM
(PHS,
output
queues)
Memory
BCM3214相關(guān)型號PDF文件下載
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Communication Miscellaneous
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