pmc-sierra,in c. pmc-1980617 (r3) ? 2001pmc-sierra, inc. PM73488 released qse 5 gbit/s atm switch fabric element features switching algorithm ? supports blocking resolution in the switch fabric. guarantees a lower bound on switch performance using a patented randomization algorithm called evil twin switching?. determines routes using specified bits in the header (self-routing switch fabric) for unicast traffic. determines output groupings using a lookup table for multicast traffic. allows output ports to be combined in groups of 1, 2, 4, 8, 16, or 32 for unicast traffic. allows output ports to be combined in groups of 1, 2, or 4 for multicast traffic. multicast support supports optimal tree-based multicast replication in the switch fabric. supports 128 internal multicast groups, expandable to 256 k with external sram. provides 64 internal cell buffers for multicast cells. diagnostic/robustness features checks the header parity. counts tagged cells. checks for connectivity and stuck-at faults on all switch fabric interconnects. i/o features provides 32 switch fabric interfaces with integrated phase aligner clock recovery circuitry. provides a start-of-cell (soc) output per four switch element interfaces. provides an external 16-bit synchronous sram (ssram) interface for multicast group expansion. provides a demultiplexed address/data cpu interface. provides an ieee 1149.1 (jtag) boundary scan test bus. physical characteristics 3.3 v supply voltage. 5 v tolerant inputs. 596-pin enhanced plastic ball grid array (epbga) package. operates from a single 66 mhz clock. applications a 5 gbit/s switch a 10 gbit/s switch a 5 gbit/s-to-20 gbit/s scalable switch architecture a 2.4 gbit/s-to-80 gbit/s scalable switch architecture a 5 gbit/s-to-320 gbit/s scalable switch architecture block diagram external ssram backpressure/ack flow to qrt/qse bp/ack from qrt/qse phase aligners and receive se_d_in and se_soc_in bp_ack drivers microprocessor interface unicast routing and distribution path arbiter multicast path data drivers phase aligners and receive bp_ack_in jtag to qrt/qse bp/ack to qrt/qse
pmc-sierra, inc. 8555 baxter place burnaby, b.c. v5a 4v7 canada tel: 604.415.6000 fax: 604.415.6200 PM73488 qse 5 gbit/s atm switch fabric element to order documentation, send email to: document@pmc-sierra.com or contact the head office, attn: document coordinator all product documentation is available on our web site at: http://www.pmc-sierra.com for corporate information, send email to: info@pmc-sierra.com pmc-1980617 (r3) ? 2001 pmc-sierra, inc. evil twin switching, qrt, and qse are trademarks of pmc-sierra, inc. u.s. patents pending typical applications 5 gbit/s atm switch using 8 qrts and 1 qse 10 gbit/s atm switch using 16 qrts and 2 qses 64 x 64 switch application (10 gbit/s) pm73487 #1 qrt? receive input pm73487 #8 qrt? receive input 4 4 622 mbit/s aggregate 622 mbit/s aggregate receive utopia level 2 pm73487 #1 qrt? transmit output pm73487 #8 qrt? transmit output 4 4 622 mbit/s aggregate 622 mbit/s aggregate transmit utopia level 2 PM73488 qse? pm73487 #1 qrt? receive input pm73487 #16 qrt? receive input 2 2 622 mbit/s aggregate 622 mbit/s aggregate receive utopia level 2 pm73487 #1 qrt? transmit output pm73487 #16 qrt? transmit output 2 2 622 mbit/s aggregate 622 mbit/s aggregate transmit utopia level 2 PM73488 qse? 2 2 2 2 PM73488 qse? pm73487 #1 qrt? receive input pm73487 #8 qrt? receive input 4 622 mbit/s aggregate receive utopia level 2 pm73487 #1 qrt? transmit output pm73487 #8 qrt? transmit output 4 622 mbit/s aggregate pm73487 #9 qrt? receive input pm73487 #16 qrt? receive input 4 pm73487 #9 qrt? transmit output pm73487 #16 qrt? transmit output transmit utopia level 2 622 mbit/s aggregate 622 mbit/s aggregate receive utopia level 2 622 mbit/s aggregate 16 16 4 transmit utopia level 2 622 mbit/s aggregate 622 mbit/s aggregate 622 mbit/s aggregate PM73488 qse? 16 16 PM73488 qse? PM73488 qse? PM73488 qse? PM73488 qse?
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