vivado原语

BUFG

        全局时钟缓冲

模版

BUFG BUFG_inst (.O(CLK0), // 1-bit output: Clock output..I(CLK)  // 1-bit input: Clock input.
);

IBUFDS

        输入时使用，可将差分信号转化为单端信号输出

模版

IBUFDS #(.DIFF_TERM("FALSE"),       // Differential Termination.IBUF_LOW_PWR("TRUE"),     // Low power="TRUE", Highest performance="FALSE" .IOSTANDARD("DEFAULT")     // Specify the input I/O standard
) IBUFDS_inst (.O(O),  // Buffer output.I(I),  // Diff_p buffer input (connect directly to top-level port).IB(IB) // Diff_n buffer input (connect directly to top-level port)
);

OBUFDS

        输出时使用，可将单端信号转为差分信号输出

模版

OBUFDS #(.IOSTANDARD("DEFAULT"), // Specify the output I/O standard.SLEW("SLOW")           // Specify the output slew rate
) OBUFDS_inst (.O(O),     // Diff_p output (connect directly to top-level port).OB(OB),   // Diff_n output (connect directly to top-level port).I(I)      // Buffer input
);

IOBUFDS

        三态差分转换器件IOBUFDS实现双向差分转换

模版

IOBUFDS #(.DIFF_TERM("FALSE"),     // Differential Termination ("TRUE"/"FALSE").IBUF_LOW_PWR("TRUE"),   // Low Power - "TRUE", High Performance = "FALSE" .IOSTANDARD("BLVDS_25"), // Specify the I/O standard.SLEW("SLOW")            // Specify the output slew rate
) IOBUFDS_inst (.O(O),     // Buffer output.IO(IO),   // Diff_p inout (connect directly to top-level port).IOB(IOB), // Diff_n inout (connect directly to top-level port).I(I),     // Buffer input.T(T)      // 3-state enable input, high=input, low=output
);