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PM8621 Datasheet(PDF) 18 Page - PMC-Sierra, Inc

Part # PM8621
Description  NSE-8G??Standard Product Data Sheet Preliminary
PDF  184 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM8621 Datasheet(HTML) 18 Page - PMC-Sierra, Inc

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NSE-8G™ Standard Product Data Sheet
Preliminary
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
17
Document ID: PMC-2010850, Issue 1
5
Block Diagram
The NSE-8G is organized as a DS0 granularity space switch. Alternatively, the NSE-8G is
organized as a self aligning (with respect to STS-12 boundaries in TelecomBus mode)
VT1.5/VT2 granularity space switch.
Figure 5 NSE- 8G Block Diagram Showing Functional Blocks
Clock
Synthesis
Unit
Tx
Ref
Microprocessor Interface
JTAG
LVDS
Receiver
(RXLV)
Data
Recovery
Unit
(DRU)
Receive
8B/10B
Decoder
(R8TD)
RP[0]
RN[0]
1/2
In-Band
Link
Controller
(ILC)
TP[0]
TN[0]
LVDS
Transmitt
er
(TXLV)
Transmit
Serializer
(PISO)
Transmit
8B/10B
Encoder
(T8TE)
1/2
In-Band
Link
Controller
(ILC)
LVDS
Receiver
(RXLV)
Data
Recovery
Unit
(DRU)
Receive
8B/10B
Decoder
(R8TD)
RP[1]
RN[1]
1/2
In-Band
Link
Controller
(ILC)
TP[1]
TN[1]
Transmit
8B/10B
Encoder
(T8TE)
1/2
In-Band
Link
Controller
(ILC)
LVDS
Receiver
(RXLV)
Data
Recovery
Unit
(DRU)
Receive
8B/10B
Decoder
(R8TD)
RP[11]
RN[11]
1/2
In-Band
Link
Controller
(ILC)
TP[11]
TN[11]
Transmit
8B/10B
Encoder
(T8TE)
1/2
In-Band
Link
Controller
(ILC)
LVDS
Transmitt
er
(TXLV)
LVDS
Transmitt
er
(TXLV)
Transmit
Serializer
(PISO)
Transmit
Serializer
(PISO)
DS0 Crossbar Switch
(DCB)
RC1FP
CMP
SYSCLK
The R8TD, in combination with the RXLV and DRU receive, decode and align incoming
SBI336/STS-12-equivalent LVDS links. Outputs are provided to the primary switching flow and
to the in-band signaling channel. These provide all analog and digital functions to terminate a
full-duplex 777.6 MHz serial SBI336S or 777.6 MHz serial TelecomBus on LVDS.
A 12 X 12 DS0 Crossbar Switch(DCB) stage switches data and control signals between the 12
ports. The switching instructions are stored in two pages of ram configured as offline and online
allowing the user to modify the offline page.



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