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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PM7344 датащи(PDF) 28 Page - PMC-Sierra, Inc |
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PM7344 датащи(HTML) 28 Page - PMC-Sierra, Inc |
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28 / 293 page  PM7344 S/UNI-MPH DATA SHEET PMC-950449 ISSUE 6 MULTI-PHY USER NETWORK INTERFACE PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 12 Figure 3 - Example 3. Multi-PHY Addressing Application S/UNI-MPH #1 TWRMPHB RRDMPHB TDAT[7:0] TSOC RDAT[7:0] RSOC TFCLK RFCLK TXPRTY RXPRTY TWA[1:0] TCAMPH RCAMPH RRA[1:0] UTOPIA LEVEL 2 COMPLIANT EGRESS DEVICE IDAT[7:0] IFCLK IAVALID IWRENB[1] IPRTY[0] ISOC IMASTER IBUS8 IPOLL IADDR[4:0] ICA[1] Single-PHY or Multi-PHY interface to switch Single-PHY or Multi-PHY interface to switch ODAT[7:0] OFCLK OSOC OAVALID OPRTY[0] OPOLL OBUS8 OTSEN OMASTER OADDR[4:0] OCA[1] ORDENB[1] S/UNI-MPH #2 TWRMPHB RRDMPHB TDAT[7:0] TSOC RDAT[7:0] RSOC TFCLK RFCLK TXPRTY RXPRTY TWA[1:0] TCAMPH RCAMPH RRA[1:0] S/UNI-MPH #N TWRMPHB RRDMPHB TDAT[7:0] TSOC RDAT[7:0] RSOC TFCLK RFCLK TXPRTY RXPRTY TWA[1:0] TCAMPH RCAMPH RRA[1:0] OSC 1:0 N-to-1 mux Backward OAM & Loopback Cells N-to-1 mux load D Q 3-to-N decoder E 1:0 4:2 4:2 load D Q 3-to-N decoder E D Q D Q UTOPIA LEVEL 2 COMPLIANT INGRESS DEVICE Example 3 shows N (where N is a number from 1 to 8) PM7344 S/UNI-MPH devices used with UTOPIA Level 2 compliant ingress and egress devices. The S/UNI-MPH supports PHY address polling by sampling the two least significant address bits (RRA[1:0] and TWA[1:0]) and generating the cell available status for the selected PHY entity. It also holds the last state of RRA[1:0] and TWA[1:0] before the assertion of RRDMPHB and TWRMPHB, respectively, thus latching the PHY address resolved by the polling process. The only support logic is that required to select between the S/UNI-MPH devices. |
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