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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PM7375-SC датащи(PDF) 39 Page - PMC-Sierra, Inc |
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PM7375-SC датащи(HTML) 39 Page - PMC-Sierra, Inc |
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39 / 430 page  PM7375 LASAR-155 DATA SHEET PMC-931127 ISSUE 6 LOCAL ATM SAR & PHYSICAL LAYER PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 23 8.3 PCI Host Interface Signals (52) Pin Name Type Pin No. Feature PCICLK Input 198 The PCI clock (PCICLK) provides timing for PCI bus accesses. PCICLK should be nominally a 50% duty cycle 0 to 33 MHz clock. PCICLKO Output 196 The PCI clock output (PCICLKO) is a buffered version of the PCI clock input, PCICLK. PCICLKO can be used to drive the SYSCLK input. ROMP Input 132 The ROMP input can be used to indicate whether an Expansion ROM is present or not. If ROMP is logic one, an expansion ROM is assumed to be present on the LASAR-155 local bus and the Expansion ROM Base Address register operates normally. If ROMP is logic zero, the XRBS bits in the Expansion ROM Base Address register is zeroed out indicating there is no expansion ROM. ROMP must be used to allow Interoperability with some BIOs implementations. ROMP has an integral pull up resistor. |
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