translate的时候报了个错？

只看该作者 · 2012-8-26 22:51

本帖最后由 zy7598865 于 2012-8-26 22:53 编辑

我是例化的这个
IBUFDS #(
.DIFF_TERM("TRUE"),    // Differential Termination
.IOSTANDARD("DEFAULT")    // Specify the input I/O standard
) adc1_data0_inst (
.O(adc1_data_in[0]),  // Buffer output
.I(adc1_in_p[0]),  // Diff_p buffer input (connect directly to top-level port)
.IB(adc1_in_n[0]) // Diff_n buffer input (connect directly to top-level port)
);

translate的时候报了这样一个错误，之前我用过没出错，请教下这是什么原因
ERROR:NgdBuild:770 - IBUFDS 'adc1_data11_inst' and IBUF 'IBUF1' on net
'adc1_data_in<11>' are lined up in series. Buffers of the same direction
cannot be placed in series.