document number: txc-04226-mc ed. 1, january 2002 ? supports up to eight 10/100 mbit/s ethernet ports, each using a smii interface supports a single 1000 mbit/s ethernet port, using a parallel gmii interface (pin shared with smii interfaces) supports ethernet management interface for control and configuration of externally connected phys. supports ieee 802.3 flow control and management statistics (rmon) on 10/100/1000 mbit/s ethernet ports supports ethernet frame encapsulation/decapsulation protocols: itu-t g.7041, generic framing procedure (gfp) itu-t x.86/x.85, link access procedure sdh (laps) itu-t q.922, link access procedure frame mode (lapf) performs mapping/demapping of encapsulated ethernet frames into/from low order (vt1.5 spe/vc-12) and high order (sts-1 spe/vc-3) virtual concatenated payloads performs mapping/demapping of encapsulated ethernet frames into/from a single contiguous concatenated (sts-3c-spe/ vc-4) payload supports optional lcas processing (per itu-t g.7042) for low and high order virtual concatenated payloads glueless memory interface to external 64/128mb sdrams supports 84/63 vt/tu low order poh and pointer processing supports high order poh processing for sts-1/vc-3/ sts-3c/vc-4 byte-wide parallel add and drop telecom bus interfaces supports per-port ethernet side and sonet/sdh system side loopback for system level diagnostics 16-bit wide microprocessor interface, selectable between motorola or intel boundary scan (ieee 1149.1 standard) + 3.3v and +1.8v power supplies, 5v tolerant i/o leads 256-lead plastic ball grid array package (27 mm x 27 mm) the ethermap ? -3 is a highly integrated device that provides for mapping of 10/ 100/1000 mbit/s ethernet into sonet/sdh sts-3/stm-1 transport pay- loads. the device supports connection for up to eight 10/100 mbit/s ethernet ports, using smii interfaces, or a single 1000 mbit/s ethernet port, using a gmii interface. in the transmit direction, for each port, received ethernet frames are encapsulated using either gfp, laps or lapf protocol. the encapsulated ethernet frames are then mapped into a configurable number of virtual concat- enated low and high order payloads, such as vt1.5 spe/vc-12/sts-1 spe/ vc-3, or a contiguous concatenated payload such as sts-3c spe/vc-4. for both low and high order payloads, the required sonet/sdh poh bytes are generated and output using a byte-wide parallel interface in the transwitch tele- com bus format. the ethermap-3 supports drop bus and add bus timing modes. in the receive direction, for each ethernet port, a configurable number of low and high order payloads are terminated, with complete poh byte processing for vir- tual or contiguous concatenated payloads. using an external sdram, align- ment and differential delay compensation for the received low and high order virtual concatenated payloads is performed. the ethernet frames are then decap- sulated using gfp, laps or lapf protocol and forwarded to each ethernet port. for both low and high order virtual concatenated payloads, optional standards based lcas processing is provided to allow hitless dynamic bandwidth adjust- ments. in addition to support for full-rate ethernet transfer, over-subscribed ethernet transfers are also supported using back pressure mechanisms in order to pre- vents frame loss. sonet/sdh add/drop and terminal multiplexers multi-service access platforms next generation ethernet switches ip dslams integrated access devices copyright ? 2002 transwitch corporation ethermap is a trademark of transwitch corporation transwitch and txc are registered trademarks of transwitch corporation ethermap-3 microprocessor telecom bus side ethernet line side txc-04226 interface ethernet into sts-3/stm-1 sonet/sdh mapper drop bus add bus sdram interface +3.3v +1.8v ho/lo ring ports ho/lo poh ports clocks (sonet/sdh ref, system, one sec.) ethernet management interface controls 10/100 mbit/s smii (port 1) 10/100 mbit/s smii (port 8) / 1000 mbit/s gmii boundary scan ? ? ? ? ? ? ? ? ethermap ? -3 device ethernet into sts-3/stm-1 sonet/sdh mapper txc-04226 product information proprietary transwitch corporation information for use solely by its customers applications description features transwitch corporation ? 3 enterprise drive shelton, connecticut 06484 usa tel: 203-929-8810 fax: 203-926-9453 www.transwitch.com
application diagram related products txc-03453 triple level 3 mapper vlsi device (tl3m) txc-04222 21/28 channel dual bus high density mapper (temx28) txc-06103 stm-1/sts-3/sts-3c sdh/sonet overhead terminator (phast-3n) txc-06212 programmable, high performance atm/ppp/tdm sonet/sdh terminator for level 12 with enhanced features vlsi device (phast-12e) further information contact transwitch for technical and ordering information on these products. phast-3n temx28 oc-3/stm-1 up to 28xds1 / 21xe1 sdram multi-service ethernet aggregation with oc-3/stm-1 uplink sdram 10/100 mbit/s 10/100 mbit/s 1000 mbit/s gigabit ethernet phy 1000 mbit/s smii interfaces smii interfaces gmii interface line add bus drop bus x8 x16 ethernet switch (24 ports) ethermap-3 ethermap-3 ? ? ? ? ? ? ? ? ? ? ? ? ? document number: txc-04226-mc ed. 1, january 2002 ethermap-3, txc-04226 proprietary transwitch corporation information for use solely by its customers transwitch reserves the right to make changes to the product(s) or circuit(s) described herein without notice. no liability is assumed as a result of their use or application. no rights under any patent accompany the sale of any such product or circuit. transwitch corporation 3 enterprise drive shelton, connecticut 06484 usa tel: 203-929-8810 fax: 203-926-9453 www.transwitch.com
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