emmc flash
时间: 2023-10-29 13:04:36 浏览: 131
EMC Unity all flash
eMMC是一种内部集成了Flash Controller的存储设备,它包括了协议、擦写均衡、坏块管理、ECC校验、电源管理、时钟管理、数据存取等功能。相比于直接将NAND Flash接入到主机端,eMMC屏蔽了NAND Flash的物理特性,减少了主机端软件的复杂度,让主机端可以专注于上层业务,省去对NAND Flash进行特殊处理。此外,eMMC通过使用Cache、Memory Array等技术,在读写性能上也比NAND Flash要好很多。而NAND Flash则需要主机端有NAND Flash Translation Layer(NFTL)或者NAND Flash文件系统来处理坏块管理、ECC等功能。另外,eMMC的读写速度也比NAND Flash快,可以达到每秒50MB到100MB以上。\[2\]\[3\]
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