PM7388 Datasheet | PMC-Sierra

FEATURES - Single-chip multi-channel packet processor supporting line rate throughput transfers of packet sizes from 40 to 9.6 Kbytes, for up to an aggregate of 336 T1s, 252 E1s, or 12 DS-3s. - Provides simultaneous support of PPP, Frame Relay, Multilink-PPP and Multilink-Frame Relay protocols. Alternative protocols supported via HDLC termination and full packet store of the data within the HDLC structure. configurable on a per multilink bundle. Optionally full packet transfers are supported on a per bundle basis. - Supports up to 168 multilink bundles with up to 12 member links per bundle. These bundles are posed of independent HDLC channels. - Support for up to 100 ms of intra bundle skew in the receive direction when supporting the minimum. fragment size. - Support for PPP header pression as per RFC 1661. - Link Control protocol packets are identified by the PID as control protocols and will be forwarded to the Any-PHY interface. FRAME RELAY - Link layer address lookup can be performed based on HDLC channel and 10 bit DLCI for HDLC channels supporting Frame Relay protocols. - The lookup algorithm can support a maximum of 16 K connection identifiers (CIs) amongst multilink FR bundles. The connection identifiers are ignored in singlelink FR channels. - Control frames are identified and forwarded to Any-PHY interface. - 12 bit sequence numbers supported. - FECN, BECN, and DE ingress processing as per FRF.12. MULTILINK PPP AND FRAME RELAY BUNDLES - Capable of supporting fragment sizes from 1 to 9.6 Kbytes. - Support for 3 egress fragmentation sizes (128, 256, and 512 bytes) - Support for 16 COS levels in accordance with RFC 2686. - Either 12 bit or 24 bit sequence number, with short and long fragment header formats, is supported. BLOCK DIAGRAM TCLK[11:0] TD[11:0] BCLK AD[31:0] ADSB CSB WR BURSTB BLAST READYB BTERMB WRDONEB INTHIB INTLOB BUSPOL RSTB PMCTEST SCAN_EN DLLTEST SYSCLK TDO TDI TCK TMS TRSTB DDLL140 ACIFP CIFPOUT ADATA[7:0] ADP APL AV5...