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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) 41 Page - PMC-Sierra, Inc |
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PM7344 датащи(HTML) 41 Page - PMC-Sierra, Inc |
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41 / 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 25 Pin Name Type Pin No. Function MPHEN Input 109 Multiphy Enable (MPHEN). This input selects the configuration of the receive and transmit cell interfaces. When MPHEN is high, the cell interfaces are configured for multi-phy addressing and signals TWRMPHB, TWA[1:0], TCAMPH, RRDMPHB, RRA[1:0], and RCAMPH are active. When MPHEN is low, the cell interfaces are configured for direct phy selection and signals TWRENB[4:1] and RRDENB[4:1] are active. RFCLK Input 74 Receive FIFO Read Clock (RFCLK). This signal is used to read ATM cells from the receive FIFOs. RFCLK must cycle at a 25 MHz or lower instantaneous rate, but at a high enough rate to avoid FIFO overflow. |
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