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# CDC #35 ## Origin Flip-flop |Graph|Signal|Clock Domain|Flip-flop| |:---:|---|---|---| |Open CDC Graph|Signal: `inst_phy_plus_lane.inst_fifo_out_ctrl.flush_ack_rd`
Usage:
- fifo_dc.vhd#446
- fifo_dc.vhd#467
- fifo_dc.vhd#471
- fifo_dc.vhd#472|inst_phy_plus_lane.clk_tx (rising)|TOP (spacefibre_light_top) > inst_phy_plus_lane (phy_plus_lane) > inst_fifo_out_ctrl (FIFO_DC) > fifo_dc.vhd#440| ## Target Flip-flop |Graph|Signal|Clock Domain|Flip-flop| |:---:|---|---|---| |Open CDC Graph|Signal: `inst_phy_plus_lane.inst_fifo_out_ctrl.empty`
Usage:
- fifo_dc.vhd#379
- fifo_dc.vhd#384
- fifo_dc.vhd#386|CLK (rising)|TOP (spacefibre_light_top) > inst_phy_plus_lane (phy_plus_lane) > inst_fifo_out_ctrl (FIFO_DC) > fifo_dc.vhd#378|
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