module amc7823_sim ( input ss, output miso, input mosi, input sclk ); // pin ss is IO_L18N_T2_32 bank 32 bus_digitizer_U15[2] AB20 // pin miso is IO_L18P_T2_32 bank 32 bus_digitizer_U15[1] AB19 // pin mosi is IO_L23N_T3_32 bank 32 bus_digitizer_U18[3] V19 // pin sclk is IO_L17N_T2_34 bank 34 bus_digitizer_U18[4] Y5 reg value=0; always @(posedge sclk) begin value <= ~value; end assign miso=value; endmodule