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PM3350-SW Datasheet(PDF) 39 Page - PMC-Sierra, Inc |
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PM3350-SW Datasheet(HTML) 39 Page - PMC-Sierra, Inc |
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39 / 224 page  ELAN 8X10 PM3350 ELAN 8 X10 DATA SHEET PMC-970109 ISSUE 3 8 PORT ETHERNET SWITCH PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND PMC-SIERRA, INC. CUSTOMERS ONLY 37 Clocking Parameter Description MIN TYP MAX Units Fck SYSCLK frequency1 1 50 50.5 MHz Tch SYSCLK High Pulse Width 8 nsec Tcl SYCLK Low Pulse Width 8 nsec Fpck PCICLK frequency2 0 40 40.5 MHz Tpch PCICLK High Pulse Width 11 nsec Tpcl PCICLK Low Pulse Width 11 nsec Trst RST* active time after PCICLK and SYSCLK stable 10 usec Notes: 1) The minimum clock frequency for SYSCLK is required to reliably refresh local DRAM memory. The nominal frequency of 50 MHz must be provided for full throughput. 2) The minimum clock frequency for PCICLK reflects completely static operation. The nominal frequency of 40 MHz must be provided for full throughput. Miscellaneous Parameter Description MIN MAX Units Tmisu MINTR* setup to posedge SYSCLK 10 nsec Tmih MINTR* hold to posedge SYSCLK 0 nsec |
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