module RxFifoRstSync #( parameter WIDTH = 1, parameter STAGES = 3 ) ( input ClkFast_i, input ClkSlow_i, input [WIDTH-1:0] RxFifoRst_i, output [WIDTH-1:0] RxFifoRst_o ); //lauch registers reg [WIDTH-1:0] rxFifoRstReg; // capture registers (* ASYNC_REG = "TRUE" *) reg [STAGES*WIDTH-1:0] rxFifoRstReg_c; assign RxFifoWrPtr_o = rxFifoWrPtrReg_c[STAGES*WIDTH-1:(STAGES-1)*WIDTH]; always @(posedge ClkFast_i) begin rxFifoRstReg <= RxFifoRst_i; end always @(posedge ClkSlow_i) begin rxFifoRstReg_c <= {rxFifoRstReg_c[(STAGES-1)*WIDTH-1:0], rxFifoRstReg}; end endmodule