The information is proprietary and confidential to PMC-Sierra, Inc., and for its customers’
internal use. In any event, you cannot reproduce any part of this document, in any form, without
the express written consent of PMC-Sierra, Inc.
PMC-2010850, (P1)
Disclaimer
None of the information contained in this document constitutes an express or implied warranty by
PMC-Sierra, Inc. as to the sufficiency, fitness or suitability for a particular purpose of any such
information or the fitness, or suitability for a particular purpose, merchantability, performance,
compatibility with other parts or systems, of any of the products of PMC-Sierra, Inc., or any
portion thereof, referred to in this document. PMC-Sierra, Inc. expressly disclaims all
representations and warranties of any kind regarding the contents or use of the information,
including, but not limited to, express and implied warranties of accuracy, completeness,
merchantability, fitness for a particular use, or non-infringement.
In no event will PMC-Sierra, Inc. be liable for any direct, indirect, special, incidental or
consequential damages, including, but not limited to, lost profits, lost business or lost data
resulting from any use of or reliance upon the information, whether or not PMC-Sierra, Inc. has
been advised of the possibility of such damage.
Trademarks
S/UNI is a registered trademark of PMC-Sierra, Inc. and NSE-8G, SBS, CHESS, TEMUX-84,
AAL1gator-32, SPECTRA, FREEDM-336, and SBI are trademarks of PMC-Sierra, Inc.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 1
Document ID: PMC-2010850, Issue 1
Contacting PMC-Sierra
PMC-Sierra
8555 Baxter Place Burnaby, BC
Canada V5A 4V7
Tel: (604) 415-6000
Fax: (604) 415-6200
Document Information: document@pmc-sierra.com
Corporate Information: info@pmc-sierra.com
Technical Support: apps@pmc-sierra.com
Web Si te: http://www.pmc-sierra.com
NSE-8G™ Standard Product Data Sheet
Preliminary
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 2
Document ID: PMC-2010850, Issue 1
• Works with SBS devices that support up to four 19.44 MHz SBI or one 77.76 MHz SBI336
bus that communicates with PMC-Sierra’s SBI device family. Alternatively, the SBS and
SBS-lite devices support up to four 19.44 MHz STS-3 TelecomBuses or one 77.76 MHz STS12 TelecomBus for connection with PMC-Sierra’s SPECTRA family of devices.
• Can be combined in applications with PMC-Sierra’s CHESS™ chip set devices (PM5374
TSE and PM5307 TBS).
• Supports a microprocessor interface used to configure/control the NSE and make DS0-
granularity switch settings.
• Supports clean error checked 8 Mbit/s full-duplex, in-band communications channels from its
attached microprocessor to the attached microprocessors of each of the 12 attached SBS336S
devices. This channel is used to initialize and control the SBSs, or other such devices, and to
implement call-establishment set-up changes.
• Supports JTAG for all non-LVDS signals.
• Requires dual power supplies at 1.8V and 3.3V.
• Packaged as a 480 ball UBGA.
• In conjunction with the SBS or SBS-lite, supports “1+1” and “1:N” fabric redundancy.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 11
Document ID: PMC-2010850, Issue 1
2 Applications
The PM8621 Narrowband Switch Element 8G (NSE-8G) supports a variety of flexible Layer
1/Layer 2 architectures in combination with the following PMC-Sierra devices:
• PM8610 SBS and PM8611 SBS-lite (SBI Serializer and Memory switching stage).
• SBI bus devices (TEMUX™/TEMAP, FREEDM devices, S/UNI®-IMA devices,
AAL1gator™ devices and other future devices).
• CHESS™ chip set devices (PM5374 TSE, PM5307 TBS, PM5315 SPECTRA™-2488, and
PM7390 S/UNI®-MACH48).
These architectures include:
• T1/E1 SONET ADMs.
• TDM ASAP applications.
• PHY cards with DS0 (and above) level switching.
NSE-8G™ Standard Product Data Sheet
Preliminary
• PSTN replacement switching cores, as part of any-service-any-port applications, and
• Voice Gateways.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 12
Document ID: PMC-2010850, Issue 1
Code,” IBM Journal of Research and Development, Vol. 27, No 5, September 1983, pp 440-
451.
NSE-8G™ Standard Product Data Sheet
Preliminary
6. U.S. Patent No. 4,486,739, P.A. Franaszek and A.X. Widmer, “Byte Oriented DC Balanced
(0,4) 8B/10B Partitioned Block Transmission Code,” December 4, 1984.
7. IEEE Std 1596.3-1996, “IEEE Standard for Low-Voltage Differential Signals (LVDS) for
Scalable Coherent Interface (SCI)”, Approved March 21, 1996
8. L.R. Ford, D.R. Fulkerson, “Flows in Networks'', Maximum Cardinality Matchings in
Bipartite Graphs
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 13
Document ID: PMC-2010850, Issue 1
4 Application Examples
Figure 1 illustrates an OC-48 SONET Ring Add/Drop Multiplexer. The PM5363 TUPP-622
devices align all paths to transport frames in preparation for VT1.5/VT2 granularity switching.
The PM8610 SBI336 Bus Serializer (SBS™) an PM8621 Narrowband Switching Element 8G
(NSE-8G™) devices support VT1.5/VT2 and above switching. The Add and Drop buses are
provided by the SBSs that are not in the SONET Ring path. In this case, they connect to T1 and
E1 mapper ports.
Figure 1 An OC-48 T1/E1 ADM (Individually Drop/Add any T1/E1 in STS-48)
NSE-8G™ Standard Product Data Sheet
Preliminary
SPECTRA-
2488
4 X
TUPP-
622
4 X
SBS
NSE20G
4 X
SBS
SBS
**
42 required to terminate
4 X
TUPP-
622
4 X
TEMAP
-84
SPECTRA-
2488
4 X
OCTAL
-LIU **
links for all 4 TEMAPS
Figure 2 illustrates another OC-48 SONET Ring ADM. In this application, the network of three
PM5310 TelecomBus Serializers (TBSs) from PMC-Sierra’s CHESS™ chip set add, drop, and
groom traffic at STS-1 granularities. The four TUPP-622 devices align any dropped STS-1s
(paths to transport frames). The virtual tributary (VT) or tributary unit (TU) switching solution is
provided by the SBS-NSE-8G-SBS network below the TUPP-622s. Four SBSs support up to an
STS-48 amount of add/drop traffic.
Figure 2 An OC-48 T1/E1 ADM (Drop/Add up to STS-48 at STS-1 Granularity)
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 14
Document ID: PMC-2010850, Issue 1
NSE-8G™ Standard Product Data Sheet
Preliminary
Figure 3 illustrates the organization of the access line size card(s) from a SONET Any Service
Any Port (ASAP) product. All traffic from the NSE-8G to the SBI link layer devices is pathaligned. See Figure 4 for a description of the PHY line cards compatible with the system in
Figure 3.
Figure 3 Any-Service-Any-Port TDM Access Solution
SBS-
lite
SBS
NSE8G
SBS
SBS
FREEDM-
336
4 X
IMA-84
12 X
AAL1gator-
32
4 X
TEMUX-84
H-MVIP
Any-PHY
(Packet)
Any-PHY
(Cell)
Any-PHY
(Cell)
Processors
DSP
T1/E1/DS0/N*DS0 Layer 2 Processing
Figure 4 shows the organization of a SONET PHY card compatible with Figure 3. As shown, both
Figure 3 and Figure 4 have NSE-8Gs, but only one instance of this device is required to connect
all the SBSs. A likely packaging of this combined system would place the NSE-8G (and a standby
NSE-8G) on separate fabric cards. In Figure 4, PM8315 TEMUXs align paths to transport frames.
Note: Figure 3 assumes this alignment.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 15
Document ID: PMC-2010850, Issue 1
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 16
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.
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
NSE-8G™ Standard Product Data Sheet
Preliminary
The T8TE, in combination with the PISO and TXLV perform 8B/10B coding and emits the LVDS
bit streams. These provide all analog and digital functions to launch a full-duplex 777.6 MHz
serial SBI336S bus or 777.6 MHz serial TelecomBus on LVDS.
The microprocessor bus interface and in-band signaling units (ILC) provide a clean (error
checked) channel between the NSE-8G and SBSs. This can be used to send messages between the
NSE-8G microprocessor-and the SBS microprocessors in a user defined format.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 18
Document ID: PMC-2010850, Issue 1
6 Description
The PM8621 NSE-8G is a monolithic CMOS integrated circuit packaged in a 480 ball UBGA
that performs DS0 and above granularity space switching on 12 SBI336 streams carried as serial
SBI336S in 8B/10B coding over LVDS at 777.6 Mbit/s. The NSE-8G also performs VT1.5/VT2
and above granularity switching on 12 STS-12/STM-4 SONET/SDH streams, carried as Serial
TelecomBus signals in 8B/10B coding over LVDS at 777.6 Mbit/s.
The NSE-8G is typically used with up to 12 PM8610 SBS or PM8611 SBS-lite devices to provide
Memory-Space-Memory switching systems. As each SBS supports either four SBI buses at 19.44
MHz or one SBI336 bus at 77.76 MHz, the overall system supports any mixture of SBI and
SBI336 byte serial buses, ranging from 48 19.44 MHz SBI buses to 12 SBI336 77.76 MHz buses
that do not exceed an aggregate bandwidth of STS-144, or about 7.5 Gbit/s. In TelecomBus mode,
the SBS devices support the same range of flexibility for 48 19.44 MHz and 12 77.76 MHz
TelecomBuses at VT1.5/VT2 granularity
Central to the NSE-8G is a 12 x 12 cross bar switch. Every clock cycle, the cross bar switches a
byte of data with control signals from each input port to an output port. The byte of data may be a
DS0 channel from a T1/E1 or may be one byte of a column comprising a T1, E1, DS3, E3,
VT1.5, VT2 or STS-1.
NSE-8G™ Standard Product Data Sheet
Preliminary
In order for switching to take place, all input and output streams must be synchronized. This is
done via the RC1FP input signal. When switching T1s, E1s, VTs and other higher order units,
only SBI336 multiframe alignment is required. The same applies for TelecomBus mode where
only frame alignment is required.
An in-band control link over the serial LVDS interface allows the NSE-8G to communicate with
the microprocessors attached to the SBS, SBS-lite or other serial SBI336S devices. The effective
bandwidth of each inband link to each device is 8 Mbit/s. The inband link provides error
detection on 32 byte user messages and some near realtime control signals between devices.
Using the near realtime control signals the NSE-8G is able to synchronize page switching,
indicate switchover between working or protected links and exchange three user defined signals
(software) and eight Auxilliary signals (software). The User and Auxilliary signals can be used to
indicates things like interrupts or can be used for handshaking between the end point
microprocessors. The message format is left to the user of the devices. The only constraint is that
each message is a maximum of 32 bytes long.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 19
Document ID: PMC-2010850, Issue 1
NSE-8G™ Standard Product Data Sheet
Preliminary
7 Pin Diagram
The NSE-8G is packaged in a 35 mm x 35 mm 480 ball UBGA.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 23
Document ID: PMC-2010850, Issue 1
8 Pin Description
8.1 Pin Description Table
Pad NameTypePin No.Function
LVDS Ports (128 Balls)
RP[1]
RN[1]
RP[2]
RN[2]
RP[3]
RN[3]
RP[4]
RN[4]
RP[5]
RN[5]
RP[6]
RN[6]
RP[7]
RN[7]
RP[8]
RN[8]
RP[9]
RN[9]
RP[10]
RN[10]
RP[11]
RN[11]
RP[12]
RN[12]
Analog
LVDS Input
J4
J3
K3
K2
L2
L1
M3
M2
R4
R3
U2
U1
U4
U3
V2
V1
AB4
AB3
AC3
AC2
AD4
AD3
AD2
AD1
NSE-8G™ Standard Product Data Sheet
Preliminary
Receive Serial Data. The differential receive serial data
links (RP[11:0]/RN[11:0]) carry the receive SBI336S or
SONET/SDH STS-12 frame data from upstream sources
in bit serial format. Each differential pair RP[X]/RN[X]
carries a constituent SBI336 or STS-12 stream. Data on
RP[X]/RN[X] is encoded in an 8B/10B format extended
from IEEE Std. 802.3. The 8B/10B character bit ‘a’ is
transmitted first and the bit ‘j’ is transmitted last. All
RP[X]/RN[X] differential pairs must be frequency locked
and phase aligned (within a certain tolerance) to each
other. RP[11:0]/RN[11:0] are nominally 777.6 Mbit/s data
streams.
Any unused or N/C, but available inputs should be tied
low using a 10 k resistor.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 24
Document ID: PMC-2010850, Issue 1
Pad NameTypePin No.Function
TP[1]
TN[1]
TP[2]
TN[2]
TP[3]
TN[3]
TP[4]
TN[4]
TP[5]
TN[5]
TP[6]
TN[6]
TP[7]
TN[7]
TP[8]
TN[8]
TP[9]
TN[9]
TP[10]
TN[10]
TP[11]
TN[11]
TP[12]
TN[12]
NSE-8G Control and Clocking (5 Balls)
SYSCLKInputA16
Analog
LVDS
Output
F2
F3
G1
G2
G3
G4
J1
J2
N1
N2
N3
N4
P2
P3
R1
R2
W1
W2
Y3
Y4
Y1
Y2
AA2
AA3
Transmit Serial Data. The differential transmit working
serial data links (TP[11:0]/TN[11:0]) carry the transmit
SBI336S or SONET/SDH STS-12 frame data to a
downstream sinks in bit serial format. Each differential
pair carries a constituent STS-12 stream. Data on
TP[X]/TN[X] is encoded in an 8B/10B format extended
from IEEE Std. 802.3. The 8B/10B character bit ‘a’ is
transmitted first and the bit ‘j’ is transmitted last. All
TP[X]/TN[X] differential pairs are frequency locked and
phase aligned (within a certain tolerance) to each other.
TP[11:0]/TN[11:0] are nominally 777.6 Mbit/s data
streams.
System Clock. The system clock signal (SYSCLK) is the
master clock for the NSE-8G device. SYSCLK must be a
77.76 MHz clock, with a nominal 50% duty cycle.
CMP and RC1FP are sampled on the rising edge of
SYSCLK.
NSE-8G™ Standard Product Data Sheet
Preliminary
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 25
Document ID: PMC-2010850, Issue 1
NSE-8G™ Standard Product Data Sheet
Pad NameTypePin No.Function
RC1FPInputD16
ReservedOutputC17Reserved pin, must be left floating
CMPInputD10
Receive Serial Interface Frame Pulse. The receive
serial interface frame pulse signal (RC1FP) provides
system timing for the receive serial interface. RC1FP is
supplied in common to all devices in a system containing
one or more NSE-20G devices. In TelecomBus mode,
RC1FP is set high once every four frames, in SBI mode
without any DS0 switching, or when switching DS0s
(WITHOUT CAS) RC1FP is also set high once every four
frames, or multiple thereof. When in SBI mode switching
DS0s WITH CAS RC1FP indicates signaling multiframe
alignment by pulsing once every 48 frames or multiples
thereof.
A software configurable delay from RC1FP is used to
indicate that the C1 multiframe boundary 8B/10B
characters have been delivered on all the receive serial
data links (RP[32:1]/RN[32:1]) and are ready for
processing by the time-space-time switching elements.
RC1FP is sampled on the rising edge of SYSCLK.
Connection Memory Page. The connection memory
page select signal (CMP) controls the selection of the
connection memory page in the NSE. When CMP is set
high, connection memory page 1 is selected. When CMP
is set low, connection memory page 0 is selected.
Changes to the connection memory page selection are
synchronized to the boundary of the next C1FP frame or
multiframe depending on the mode:
4-Frame SBI/SBI336 mode:
CMP is sampled at the C1 byte position of the incoming
bus on the first frame of the four-frame multiframe.
Changes to the connection memory page selection are
synchronized to the frame boundary (A1 byte position) of
the next four-frame multiframe.
48-Frame SBI/SBI336 mode:
CMP is sampled at the C1 byte position of the incoming
bus on the first frame of the 48-frame multiframe.
Changes to the connection memory page selection are
synchronized to the frame boundary (A1 byte position) of
the next 48-frame multiframe.
TelecomBus mode:
CMP is sampled at the C1 byte position of every frame
on the incoming bus. Changes to the connection memory
pate selection are synchronized to the frame boundary
(A1 byte position) of the next frame.
Preliminary
CMP is sampled on the rising edge of SYSCLK at the
RC1FP frame position.
RSTBInputB18
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 26
Document ID: PMC-2010850, Issue 1
Reset Enable Bar. The active low reset signal (RSTB)
provides an asynchronous reset for the NSE. RSTB is a
Schmitt triggered input with an integral pull-up resistor
Pad NameTypePin No.Function
Microprocessor Interface (49 Balls)
CSBInputAM30
RDBInputAM29
WRBInputAN29
Chip Select Bar. The active low chip select signal (CSB)
controls microprocessor access to registers in the NSE8G device. CSB is set low during NSE-8G
Microprocessor Interface Port register accesses. CSB is
set high to disable microprocessor accesses.
If CSB is not required (i.e. register accesses controlled
using RDB and WRB signals only), CSB should be
connected to an inverted version of the RSTB input.
Read Enable Bar. The active low read enable bar signal
(RDB) controls microprocessor read accesses to
registers in the NSE-8G device. RDB is set low and CSB
is also set low during NSE-8G Microprocessor Interface
Port register read accesses. The NSE-8G drives the
D[31:0] bus with the contents of the addressed register
while RDB and CSB are low.
Write Enable Bar. The active low write enable bar signal
(WRB) controls microprocessor write accesses to
registers in the NSE-8G device. WRB is set low and CSB
is also set low during NSE-8G Microprocessor Interface
Port register write accesses. The contents of D[31:0] are
clocked into the addressed register on the rising edge of
WRB while CSB is low.
NSE-8G™ Standard Product Data Sheet
Preliminary
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 27
Document ID: PMC-2010850, Issue 1
Pad NameTypePin No.Function
D[31]
D[30]
D[29]
D[28]
D[27]
D[26]
D[25]
D[24]
D[23]
D[22]
D[21]
D[20]
D[19]
D[18]
D[17]
D[16]
D[15]
D[14]
D[13]
D[12]
D[11]
D[10]
D[9]
D[8]
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
A[11
A[10]
A[9]
A[8]
A[7]
A[6]
A[5]
A[4]
A[3]
A[2]
A[1]
A{0]
I/O
InputAP28
AM24
AN23
AM23
AN22
AL22
AN21
AM21
AP20
AP19
AN19
AM19
AM18
AN18
AP18
AL17
AN17
AM16
AN16
AL15
AN15
AL14
AM14
AM13
AL13
AM12
AN12
AL11
AN11
AL10
AM10
AM9
AL9
AN27
AM27
AP26
AN26
AL26
AM26
AN25
AM25
AL25
AP24
AN24
Microprocessor Data Bus. The bi-directional data bus,
D[31:0] is used during NSE-8G Microprocessor Interface
Port register reads and write accesses. D[31] is the most
significant bit of the data words and D[0] is the least
significant bit.
Microprocessor Address Bus. The microprocessor
address bus (A[11:0]) selects specific Microprocessor
Interface Port registers during NSE-8G register
accesses.
NSE-8G™ Standard Product Data Sheet
Preliminary
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 28
Document ID: PMC-2010850, Issue 1
Pad NameTypePin No.Function
ALEInputAL30
INTBOpen Drain
Output
JTAG Port (5 Balls)
TCKInputB14
TMSInputB13
TDIInputC12
TDOTri-stateC11
TRSTBInputD14
AN30
Address Latch Enable. The address latch enable signal
(ALE) is active high and latches the address bus
(A[11:0]) when it is set low. The internal address latches
are transparent when ALE is set high. ALE allows the
NSE-8G to interface to a multiplexed address/data bus.
ALE has an integral pull up resistor.
Interrupt Request Bar. The active low interrupt enable
signal (INTB) output goes low when an NSE-8G interrupt
source is active and that source is unmasked. INTB
returns high when the interrupt is acknowledged via an
appropriate register access. INTB is an open drain
output.
Test Clock. The JTAG test clock signal (TCK) provides
timing for test operations that are carried out using the
IEEE P1149.1 test access port.
Test Mode Select. The JTAG test mode select signal
(TMS) controls the test operations that are carried out
using the IEEE P1149.1 test access port. TMS is
sampled on the rising edge of TCK. TMS has an integral
pull-up resistor.
Test Data Input. The JTAG test data input signal (TDI)
carries test data into the NSE-8G via the IEEE P1149.1
test access port. TDI is sampled on the rising edge of
TCK. TDI has an integral pull-up resistor.
Test Data Output. TheJTAG test data output signal
(TDO) carries test data out of the NSE-8G via the IEEE
P1149.1 test access port. TDO is updated on the falling
edge of TCK. TDO is a tri-state output which is inactive
except when scanning of data is in progress.
Test Reset Bar. The active low JTAG test reset signal
(TRSTB) provides an asynchronous NSE-8G test access
port reset via the IEEE P1149.1 test access port. TRSTB
is a Schmitt triggered input with an integral pull-up
resistor.
Note that when TRSTB is not being used, it must be
connected to the RSTB input.
NSE-8G™ Standard Product Data Sheet
Preliminary
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 29
Document ID: PMC-2010850, Issue 1
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