Xilinx 7 Series User Manual page 30

Chapter 2: Shared Features
Table 2-5: GTPE2_COMMON Attributes
SIM_PLL0REFCLK_SEL
SIM_PLL1REFCLK_SEL
Table 2-6
30
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Attribute Type
3-bit Binary
3-bit Binary
defines the clocking ports for the GTPE2_CHANNEL primitive.
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Description
This attribute selects the reference clock source
used to drive PLL0 in simulation for designs
where PLL0 is always driven by the same
reference clock source.
SIM_PLL0REFCLK_SEL allows for simulation
before and after the port swap changes. This
allows for the block to be simulated with the
correct clock source both before and after the port
swap. SIM_PLL0REFCLK_SEL must be set to
the same value as PLL0REFCLK SEL[2:0]. For
designs that require the reference clock source to
be changed on the fly, the port PLL0REFCLKSEL
is used instead to dynamically select the reference
clock source.
This attribute selects the reference clock source
used to drive PLL1 in simulation for designs
where PLL1 is always driven by the same
reference clock source.
SIM_PLL1REFCLK_SEL allows for simulation
before and after the port swap changes. This
allows for the block to be simulated with the
correct clock source both before and after the port
swap. SIM_PLL1REFCLK_SEL must be set to
the same value as PLL1REFCLK SEL[2:0]. For
designs that require the reference clock source to
be changed on the fly, the port PLL1REFCLKSEL
is used instead to dynamically select the reference
clock source.
7 Series FPGAs GTP Transceivers User Guide
UG482 (v1.9) December 19, 2016