diff options
Diffstat (limited to 'pnr/de1_dac/de1_dac_special.sdc')
| -rw-r--r-- | pnr/de1_dac/de1_dac_special.sdc | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/pnr/de1_dac/de1_dac_special.sdc b/pnr/de1_dac/de1_dac_special.sdc new file mode 100644 index 0000000..17260a6 --- /dev/null +++ b/pnr/de1_dac/de1_dac_special.sdc @@ -0,0 +1,21 @@ +create_clock -period 20.000 -name CLOCK_50 [get_ports CLOCK_50] + +set default_inputs [get_ports KEY0] +set default_inputs [add_to_collection $default_inputs [get_ports ADC_OTR*]] + +# Some clock for ADC/DAC Board +set clock_outputs [get_ports ADC_CLK*] +set clock_outputs [add_to_collection $clock_outputs [get_ports DAC_CLK*]] +set clock_outputs [add_to_collection $clock_outputs [get_ports DAC_WRT*]] + +set default_outputs [remove_from_collection [all_outputs] [get_ports DAC_D*]] +set default_outputs [remove_from_collection $default_outputs $clock_outputs] + +# Default Timing Constrains for Inputs/Outputs +set_input_delay -clock CLOCK_50 5 $default_inputs +set_output_delay -clock CLOCK_50 5 $default_outputs +# Special Timing for ADC and DAC Data I/O +set_input_delay -clock CLOCK_50 17 [get_ports ADC_D*] +set_output_delay -clock CLOCK_50 -clock_fall 7 [get_ports DAC_D*] +# Special Timing for clock outputs +set_output_delay -clock CLOCK_50 2 $clock_outputs |