ISE IP核使用说明.doc

ISE IP核使用说明（14.5） 1.除法器.....................................................................................................................................1 2．CORDIC –IP核 ......................................................................................................................4 3.CORIDC-sin/cos........................................................................................................................6 4.CORDIC-SQRT ....................................................................................................................... 10 5.Block Memory ...................................................................................................................... 13 6.Shift-Register........................................................................................................................ 21 7.ACC累加器 .......................................................................................................................... 25 8.复数乘法器.......................................................................................................................... 27 9.乘法器.................................................................................................................................. 28 10.FFT ...................................................................................................................................... 30 11.FIFO .................................................................................................................................... 33 1.除法器 1.设置  使用 High Radix 类型（这样会多出 RDY 和 ND 两个握手信号方便连续的除法） 上面有个地方说错了，Clocks per Division 不是运算需要的时间，Latency 才是需要的时钟数 Radix2 类型，没有 RDY 信号反馈运算是否完成（可能需要对时钟计数来确定是否运算完成,所用时钟是确定值）。 1，除法器内核设置为 Radix2 时，小数位包含符号位已经补码化，小数位可以按照如下方式接在整数位后面: wire [7:0] qv_q_cp; assign qv_q_cp=fv_q[26]?(qv_q[7:0]-1b1):qv_q[7:0]; wire [33:0] v_q_div;  assign v_q_div= {qv_q_cp,fv_q[25:0]}; assign xk_re_tmp = xk_re_quoti[26]?{xk_re_quoti-1b1,xk_re_frac[8:0]}:{xk_re_quoti,xk_re_