搜索 - 科创

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FRAM,即铁电存储器,读写速度基本和片内RAM速度一样,只需一条指令,数据可以永久保存,要求高速存储的场合很适合,!只是VRS51L3074这个单片机50多元一个!,贵啊

目前来看还是带SDRAM的要好点（如果外置的SDRAM翻车的话）之前也考虑过要不要上GD32F450，也怕翻车，就先上STM32F429429有个好，能找到现成的uboot和uclinux，到时候可以...

首先要制备大肠杆菌的感受态细胞，以便于接收外源基因。所谓感受态细胞是通过一定的试剂处理细胞，使细胞处于易于接受外源DNA的生理状态。通常用0.1M CaCl2处理细胞，就可得到感受态细胞。细胞原本所处...

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