URL
https://opencores.org/ocsvn/tv80/tv80/trunk
Subversion Repositories tv80
[/] [tv80/] [trunk/] [rtl/] [simple_gmii/] [sync2.v] - Rev 106
Go to most recent revision | Compare with Previous | Blame | View Log
// // Copyright (c) 2004 Guy Hutchison (ghutchis@opencores.org) // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included // in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. // Simple wrapper for a clock synchronizer // // The following code can (should) be replaced with metastability-hardened // flops from your technology library. module sync2 ( input clk, input data_in, output data_out ); reg sync_ff1, sync_ff2; always @(posedge clk) begin sync_ff1 <= #1 data_in; sync_ff2 <= #1 sync_ff1; end assign data_out = sync_ff2; endmodule // sync2
Go to most recent revision | Compare with Previous | Blame | View Log