Quartus II 与ModelSim-SE联合仿真Shift_ram

原理介绍

The ALTSHIFT_TAPS IP core supports single-bit and multiple-bit data shifting at one
clock cycle, depending on the width of the shiftin and shiftout ports. For example,
if the shiftin and shiftout ports are single-bit data, only one bit is shifted per clock
cycle. If the shiftin and shiftout ports are multiple-bit data, such as one-word data
(8-bit), the whole word is shifted per clock cycle.

Shift_ram能够通过shiftin设置移位输出的位宽，TAP_DISTANCE 设置每行数据单元个数；

NUMBER_OF_TAPS设置抽头的数量；

    TAP_DISTANCE = 3；表征每行有3个数据单元；

NUMBER_OF_TAPS = 4.；表征有4列，即抽头的数量；

将每一行的抽头输出就形成了taps，shiftout输出的是taps的高位数据单元；

实例

调用IP

测试数据产生模块

Modelsim仿真

仿真结果与datasheet的实例说明一致；

Quartus II 与ModelSim-SE联合仿真Shift_ram

原文：http://www.cnblogs.com/logic3/p/6284870.html