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PM8621 View Datasheet(PDF) - PMC-Sierra

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PM8621 Datasheet PDF : 184 Pages
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NSE-8G™ Standard Product Data Sheet
Preliminary
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
RP[0]
RN[0]
RP[1]
RN[1]
LVDS
Receiver
(RXLV)
Data
Recovery
Unit
(DRU)
Receive
8B/10B
Decoder
(R8TD)
1/2
In-Band
Link
Controller
(ILC)
LVDS
Receiver
(RXLV)
Data
Recovery
Unit
(DRU)
Receive
8B/10B
Decoder
(R8TD)
1/2
In-Band
Link
Controller
(ILC)
1/2
In-Band
Link
Controller
(ILC)
Transmit
8B/10B
Encoder
(T8TE)
Transmit
Serializer
(PISO)
LVDS
Transmitt
er
(TXLV)
1/2
In-Band
Link
Controller
(ILC)
Transmit
8B/10B
Encoder
(T8TE)
Transmit
Serializer
(PISO)
LVDS
Transmitt
er
(TXLV)
TP[0]
TN[0]
TP[1]
TN[1]
RP[11]
RN[11]
LVDS
Receiver
(RXLV)
Data
Recovery
Unit
(DRU)
Receive
8B/10B
Decoder
(R8TD)
1/2
In-Band
Link
Controller
(ILC)
RC1FP
CMP
SYSCLK
DS0 Crossbar Switch
(DCB)
1/2
In-Band
Link
Controller
(ILC)
Transmit
8B/10B
Encoder
(T8TE)
Transmit
Serializer
(PISO)
LVDS
Transmitt
er
(TXLV)
TP[11]
TN[11]
Tx
Clock
Ref
Synthesis
Unit
Microprocessor Interface
JTAG
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.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
17
Document ID: PMC-2010850, Issue 1
 

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