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Altera_Forum
Honored Contributor
16 years agoTimeQuest .sdc constraints for EPCS (ALTASMI_PARALLEL megafunction)
Hi all, I'm using the ALTASMI_PARALLEL megafunction to access a EPCS16 device at 25MHz (active serial) on a Cyclone III device. The EPCS16 is 2 centimeters away from the FPGA (very small PCB ...
Altera_Forum
Honored Contributor
16 years agoThere seems to be two different clocks in these statements:
# EPCS clk output create_generated_clock -name {epcs_dclk} -source [get_pins {pll|altpll_component|auto_generated|pll1|clk[1]}] [get_ports {*ALTERA_DCLK}] set_max_skew -from [get_clocks {clk_epcs}] -to [get_ports {*ALTERA_DCLK}] 1 Was that intended? I would think you might have ment something more like this: # EPCS clk output create_generated_clock -name {clk_epcs} -source [get_pins {pll|altpll_component|auto_generated|pll1|clk[1]}] [get_ports {*ALTERA_DCLK}] set_max_skew -from [get_clocks {clk_epcs}] -to [get_ports {*ALTERA_DCLK}] 1 In order for the "set_max_skew" command to be applied to the design by the tools.