?? dm9000a_if.v
字號:
module DM9000A_IF( // HOST Side
iDATA,
oDATA,
iCMD,
iRD_N,
iWR_N,
iCS_N,
iRST_N,
iCLK,
iOSC_50,
oINT,
// DM9000A Side
ENET_DATA,
ENET_CMD,
ENET_RD_N,
ENET_WR_N,
ENET_CS_N,
ENET_RST_N,
ENET_INT,
ENET_CLK );
// HOST Side
input [15:0] iDATA;
input iCMD;
input iRD_N;
input iWR_N;
input iCS_N;
input iRST_N;
input iCLK;
input iOSC_50;
output [15:0] oDATA;
output oINT;
// DM9000A Side
inout [15:0] ENET_DATA;
output ENET_CMD;
output ENET_RD_N;
output ENET_WR_N;
output ENET_CS_N;
output ENET_RST_N;
output ENET_CLK;
input ENET_INT;
reg [15:0] TMP_DATA;
reg ENET_CMD;
reg ENET_RD_N;
reg ENET_WR_N;
reg ENET_CS_N;
reg ENET_CLK;
reg [15:0] oDATA;
reg oINT;
assign ENET_DATA = ENET_WR_N ? 16'hzzzz : TMP_DATA;
always@(posedge iCLK or negedge iRST_N)
begin
if(!iRST_N)
begin
TMP_DATA <= 0;
ENET_CMD <= 0;
ENET_RD_N <= 1;
ENET_WR_N <= 1;
ENET_CS_N <= 1;
oDATA <= 0;
oINT <= 0;
end
else
begin
oDATA <= ENET_DATA;
oINT <= ENET_INT;
TMP_DATA <= iDATA;
ENET_CMD <= iCMD;
ENET_CS_N <= iCS_N;
ENET_RD_N <= iRD_N;
ENET_WR_N <= iWR_N;
end
end
always@(posedge iOSC_50)
ENET_CLK <= ~ENET_CLK;
assign ENET_RST_N = iRST_N;
endmodule
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