Altera Arria V Hard IP for PCI Express Bedienungsanleitung Seite 187

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Chapter 9: Reset and Clocks 9–7
Clocks
December 2013 Altera Corporation Arria V Hard IP for PCI Express
User Guide
Transceiver Clock Signals
As Figure 9–5 indicates, there are two clock inputs to the PHY IP Core for PCI Express
IP core transceiver.
refclk
—You must provide this 100 MHz or 125 MHz reference clock to the Arria
V Hard IP for PCI Express IP core.
reconfig_clk
—You must provide this 100 MHz or 125 MHz reference clock to the
transceiver PLL. You can either use the same reference clock for both the
refclk
and
reconfig_clk
or provide separate input clocks. The PHY IP Core for PCI
Express IP core derives
fixedclk
used for receiver detect from
reconfig_clk
.
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