FIFO · 芯动力——硬件加速设计方法

![](https://img.kancloud.cn/f3/af/f3af8c873351ac68d8e87d0cf925fadc_921x752.png) ![](https://img.kancloud.cn/2d/c0/2dc072c545b072642a3ea799b118d341_921x499.png) ![](https://img.kancloud.cn/7e/51/7e513e89bc585f331160c7fa460266ef_811x446.png) ![](https://img.kancloud.cn/5d/6d/5d6d196ee7fd6f17c945b156a27dd59e_900x740.png) ![](https://img.kancloud.cn/05/87/058793b6e48aabbcf3a808015b08de89_851x511.png) fifo ![](https://img.kancloud.cn/b5/38/b538519a61f1b496645f7de7ad0aaeba_409x51.png) ![](https://img.kancloud.cn/82/63/826318eec68d2331413d2728138a5b59_871x541.png) ![](https://img.kancloud.cn/a5/ac/a5ac83ef686d54e21dc9d691929e8d29_847x333.png) ![](https://img.kancloud.cn/e6/a3/e6a3be93f9587f73af99c57c7a1e3c73_866x436.png) ![](https://img.kancloud.cn/f5/58/f5586885e925df5a768d472e8d47eba2_800x408.png) ![](https://img.kancloud.cn/fd/e8/fde80c771773138fb519c91403ce802f_766x735.png) ![](https://img.kancloud.cn/88/81/888116c3610e7e6491f597c9421d2a1e_804x394.png) 将读指针传递到写时钟域，才能产生满信号 ![](https://img.kancloud.cn/0c/6b/0c6b4e2be2d143ba2abcdb8fcf9808d6_908x472.png) 将写指针传递到读时钟域，才能产生空信号 ![](https://img.kancloud.cn/88/98/8898e6b45a1a3f98883f63ba331d9025_431x284.png) ![](https://img.kancloud.cn/d7/3a/d73aa50738bc66ee24283e1a7ef83862_862x443.png) 读写指针相等时，写入的数据，已经被全部读走。 ![](https://img.kancloud.cn/f3/ce/f3ce38b271a0476bce4f136b629b98b2_827x583.png) 当写地址超过读地址时，写到了最高地址后，从0开始写。再次追上了读地址，这个时候，已经读过的地址空间，再次被写地址写入，而读地址到最高地址之间的数据，还尚未被读，说明FIFO处于一个满的状态。 ![](https://img.kancloud.cn/6b/0f/6b0f14319763ec7ee7500a53d2f42b23_950x537.png) ![](https://img.kancloud.cn/67/79/67797f64702e7607c685bd9f16163a5c_416x269.png) ![](https://img.kancloud.cn/dd/64/dd64a477aaaa5f5041fc2e30f526c03a_199x76.png) ![](https://img.kancloud.cn/0d/6d/0d6d80e13735768494f9390c2497135b_439x64.png) ![](https://img.kancloud.cn/15/82/158206ab4496ff74f49e9d1c2cd0d90a_989x591.png) 格雷码能很好的降低亚稳态出现的概率 ![](https://img.kancloud.cn/76/5d/765d77fdd96e0d10216ee6b45079924e_858x507.png) ![](https://img.kancloud.cn/01/65/01653ce7fabcb933489a1d730b59fc73_906x420.png) ![](https://img.kancloud.cn/e7/2e/e72ec28e5bd832d9723abca24b9385af_809x458.png) ![](https://img.kancloud.cn/f3/35/f3356d955c84009c06aae7715738c1de_774x558.png) ![](https://img.kancloud.cn/a6/36/a63651ffb1fd48600cb0eb0ad7a8519a_757x608.png) ![](https://img.kancloud.cn/ff/5a/ff5a0182793d2afc82e0201992efdf09_796x614.png) ![](https://img.kancloud.cn/81/df/81df1731e0c62ffc7ccc11fad827cb61_810x347.png) ![](https://img.kancloud.cn/dd/23/dd23b9d8bd8a5cf20839bdad2fd8dab0_882x480.png) ![](https://img.kancloud.cn/b6/d6/b6d6f9f281b4d8b6fcdee7905ecb04ee_657x448.png) ![](https://img.kancloud.cn/c0/88/c08852b5e09e462a15b479c5ae2be32f_913x422.png) ![](https://img.kancloud.cn/01/f7/01f7bce154e3013441c2cd88f2498066_758x428.png) ![](https://img.kancloud.cn/04/5a/045af61abb168303b4b3ffa651564779_875x442.png) ![](https://img.kancloud.cn/43/be/43be985654fcb563e8dcce6ab30de12a_680x443.png) ![](https://img.kancloud.cn/c8/0d/c80d085fed091cdd2bf21d4e2bd11302_872x467.png) ![](https://img.kancloud.cn/cf/88/cf88b6e2a8bd8c9e9e111a3cb35ffed4_924x475.png) ![](https://img.kancloud.cn/57/af/57afabd5f5b6be96eb98f66fd31aa55f_850x481.png)