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介绍锁相环时钟发生器CY2254
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2009-05-23
久醉不醒
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The CY2254 is a two-PLL clock generator for the Intel TritonTM chipset-based motherboard and other Pentium™ motherboards.It features four high-drive outputs at the CPU clock frequency (50, 60, or 66.66 MHz, selected by two pins), six
high-drive synchronous PCI clock outputs at half the frequency of the CPU clocks, two high-drive Reference outputs at 14.318 MHz, a 12-MHz Keyboard clock output, and a 24-MHz Floppy clock output. This application note discusses the internal architecture of the CY2254, and provides recommendations for using it in a system.
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