IOBUF的使用

在FPGA的设计中,避免不了使用厂家的原语。zynq-7020是xilinx的7 series FPGA,参考《UG768-Xilinx 7 Series FPGA Libraries Guide for HDL Designs》查看相应的原语使

永指导

一、IOBUF的介绍

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2、example code:

来自xilinx官网论坛

module abcd(
input clk,
inout io_data,
input t,
output reg ext_out,
input in_ext
);


wire data_in;
reg data_out;


IOBUF #(
.DRIVE(12), // Specify the output drive strength
.IBUF_LOW_PWR("TRUE"), // Low Power - "TRUE", High Performance = "FALSE"
.IOSTANDARD("DEFAULT"), // Specify the I/O standard
.SLEW("SLOW") // Specify the output slew rate
) IOBUF_inst (
.O(data_in), // Buffer output
.IO(io_data), // Buffer inout port (connect directly to top-level port)
.I(data_out), // Buffer input
.T(t) // 3-state enable input, high=input, low=output
);


always @(posedge(clk))
begin
ext_out <= data_in;
data_out <= in_ext;
end
endmodule

综合后:

IOBUF

二、参考资料

1、https://forums.xilinx.com/xlnx/board/crawl_message?board.id=SYNTHBD&message.id=16841

2、UG768-《Xilinx 7 Series FPGA Libraries Guide for HDL Designs》

posted on 2018-06-11 20:29  阿里萨  阅读(5667)  评论(0编辑  收藏  举报

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