In this step, you export waivers with the
write_waivers Tcl command.Note: The XDC output file can be imported
using the
read_xdc or source Tcl
commands.- To export the CDC waivers, enter:
write_waivers -type cdc waivers.xdc.Tip: Alternatively, because there are no DRC or methodology waivers, you can enter:write_waivers waivers.xdcorwrite_xdc -type waiver waivers.xdc. - Open the waivers.xdc file to view the
three waivers.Note: The following example is reformatted to better show the different command line options.
create_waiver -type CDC -id {CDC-10} -user "AMD" \ -desc "This is a safe CDC per review with the team" \ -from [get_pins i_my_ip_support_block/jesd204_i/inst/i_my_ip/i_tx/i_tx_counters_32/got_sysref_r_reg/C] \ -to [get_pins {i_my_ip_support_block/jesd204_i/inst/sync_tx_sysref_captured/syncstages_ff_reg[0]/D}] \ -timestamp "<timestamp>" ;#1 create_waiver -type CDC -id {CDC-11} -user "AMD" \ -desc "Safe fanout. Circuitry has been released" \ -from [get_pins {i_my_ip_support_block/jesd204_i/inst/i_my_ip_reset_block/stretch_reg[10]/C}] \ -to [get_pins {i_my_ip_support_block/i_jesd204_phy/inst/jesd204_phy_block_i/sync_rx_reset_data/xpm_cdc_async_rst_inst/arststages_ff_reg[0]/CLR}] \ -timestamp "<timestamp>" ;#1 create_waiver -type CDC -id {CDC-11} -user "AMD" \ -desc "Safe fanout. Circuitry has been released" \ -from [get_pins {i_my_ip_support_block/jesd204_i/inst/i_my_ip_reset_block/stretch_reg[10]/C}] \ -to [get_pins {i_my_ip_support_block/i_jesd204_phy/inst/jesd204_phy_block_i/sync_tx_reset_data/xpm_cdc_async_rst_inst/arststages_ff_reg[0]/CLR}] \ -timestamp "<timestamp>" ;#2