PMC PM7326 Datasheet
PMC-Sierra,Inc.
ATM/PACKET Traffic Manager and Switch
PM7326
S/UNI-APEX
FEATURES
• ATM (fixed length cell) and packet/
frame traffic manager and switch.
• 2048 line ports, 4 WAN ports, and a
high speed microprocessor port. Any
port to any port switching for 64k
independent connections.
• Manages up to 256k cell (16M byte)
data buffer and 4M byte context
memory shared over all ports.
• Configurable progressive thro ttling of
buffer consumption, with me mo ry
reservation under high consumption.
Supports ABR with EFCI marking.
• Buffer congestion contr olled v ia Parti al
Packet Discard, Early Packet Discard
(PPD/EPD). Cell at a time discard also
supported.
• For frame/packet flows:
• Supports external wire speed HDLC
processor, SAR, and flow classifier
via packet-contiguous queuing and
scheduling.
• Error indication in AAL 5 EOM tra ile r
(set by SAR or classifier) can invo ke
errored packet discard, thereby
eliminating need for packet buffers
in external devices.
• Traffic queuing algorithm is highly
configurable on a per connection, per
class, and per port basis.
• Configurable scheduling of 4 classes
of service on every port, with rate
shaping available fo r the 4 WAN ports.
Configurable traffic parameters
enabling a mix of CBR, VBR, GFR,
and UBR classes.
• Configurable OAM cell queuing and
special handling on all ports.
• VPI/VCI header mapping.
• Supports 700 Mb/s ingress traffic and
700 Mb/s egress traffic aggregated
across all ports.
• Low power 3.3/2.5V CMOS.
• Standard 5 pin P1149 JTAG port.
• 352 ball SBGA, 35mm x 35mm.
BUS INTERFACES
• 8/16 bit, 52 MHz UTOPIA L2 bus.
• Line side:
• Enhanced UTOPIA Tx master
supports 2048 ports. Rx master
supports 32 ports.
• Or single port slave.
• WAN side:
• Master (with optional cell length
expansion) supports 4 Tx or Rx
ports.
• Or single port slave.
MICROPROCESSOR INTERFACE
• 66 MHz, 32 bit address/data bus
capable of single or burst access to
internal registers and cell buffers.
• Supports cell/packet transfer to/from
any port, with CRC32 and CRC10
calculation supported in hardware.
• Works seamlessly with
S/UNI-VORTEX and S/UNI-DUPLEX
to implement a system-wide
embedded communication channel.
CONGESTION CONTROL
• Traffic discard thresholds configurable
per connection (independent CLP0
and CLP1 thresholds), per class, per
port, and per direction.
• Guaranteed Frame Rate (GFR)
implemented via CLP0 min imum buffer
size reservation per connection.
QUEUING & SCHEDULING
• 64k traffic staging queues (one per
connection) individually assignable to
any CoS on any port.
• 8k + 20 scheduling queues: 4 CoS
queues per port, 2048 line ports, 4
WAN ports, and 1 processor port.
BLOCK DIAGRAM
Ctrl Lines
AD[31:0]
LRCLK
LRPA
LRSX
LRSOP
LRDAT[15:0]
LRPRTY
LRENB
LRADR[5:0]
WRCLK
WRPA
WRSX
WRSOP
WRDAT[15:0]
WRPRTY
WRENB
WRADR[2:0]
Processor
Interface
Loop Rx
Any-PHY
WAN Rx
Any-PHY
OE
CMD[33:0]
CMA[19:0]
CMP[1:0]
SSRAM Interface
Que Management &
Scheduling
SDRAM Interface
RSTB
CBCSB
SYSCLK
CBCASB
CBRASB
CMCEB
CMRWB
CBRWEB
CBA[11:0]
CBBS[1:0]
CMAB[18:17]
CBDQM[1:0]
CBDQ[31:0]
JTAG Test
Access Port
TDI
TDO
TMS
LTCLK
LTPA
LTSX
Loop Tx
Any-PHY
WAN Tx
Any-PHY
TCK
TRSTB
LTSOP
LTDAT[15:0]
LTPRTY
LTENB
LTADR[11:0]
WTCLK
WTPA
WTSX
WTSOP
WTDAT[15:0]
WTPRTY
WTENB
WTADR[2:0]
PMC-990146 (P2) PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE © 1999 PMC-Sierra, Inc.
ATM/PACKET Traffic Manager and Switch
PM7326 S/UNI-APEX
PACKET ACCESS MULTIPLIER
modem
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modem
FREEDM
Head Office:
PMC-Sierra, Inc.
#105 - 8555 Baxter Place
Burnaby, B.C. V5A 4V7
Canada
Tel: 604.415.6000
Fax: 604.415.6200
Cut-thru AAL5
Line Cards
S/UNI-DUPLEX
processor
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
S/UNI-
VORTEX
é
é
é
S/UNI-
VORTEX
S/UNI-
VORTEX
é
é
é
S/UNI-
VORTEX
8 Links per S/UNI-VORTEX
To order documentation,
send email to:
document@pmc-sierra.com
or contact the head office,
Attn: Document Coordinator
processor, flow
co-processor
Flow
Classifier
Flow
Classifier
S/UNI-
APEX
RAM
processor, flow
co-processor
S/UNI-
APEX
RAM
All product documentation is available
on our web site at:
http://www.pmc-sierra.com
For corpo rate information,
send email to:
info@pmc-sierra.com
Cut-thru
AAL5 +
Classifier
Cut-thru
AAL5 +
Classifier
FREEDM
FREEDM
Framer
Common Card,
Framer
Common Card,
PMC-990146 (P2)
© 1999 PMC-Sierra, Inc.
working
protection
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