Processing bootloader.tinyfpga_bootloader_inst.usb_fs_pe_inst.usb_fs_in_pe_inst.in_data_buffer:
  Properties: ports=2 bits=768 rports=1 wports=1 dbits=8 abits=7 words=96
  Checking rule #1 for bram type $__ICE40_RAM4K_M0 (variant 1):
    Bram geometry: abits=8 dbits=16 wports=0 rports=0
    Estimated number of duplicates for more read ports: dups=1
    Metrics for $__ICE40_RAM4K_M0: awaste=160 dwaste=8 bwaste=3328 waste=3328 efficiency=18
    Rule #1 for bram type $__ICE40_RAM4K_M0 (variant 1) accepted.
    Mapping to bram type $__ICE40_RAM4K_M0 (variant 1):
      Write port #0 is in clock domain \clk_48mhz.
        Mapped to bram port B1.
      Read port #0 is in clock domain !~async~.
        Bram port A1.1 has incompatible clock type.
        Failed to map read port #0.