RKDocs: RK Vendor StorageApplication Note
概念
Vendor storage is designed for stored SN, MAC and other vendor data.
Feature:
- Unique ID Access
- Reliable Data Validation
- Power Lost Recovery
- Writable and Readable for PC
- Writable and Readable for UBOOT
- Writable and Readable for Kernel
- Writable and Readable for Linux Application
架构
存储结构
SPI NOR FLASH
SPI一种串行通信接口, Flash是非易失性存储介质, 分为NOR和NAND两种, 在1~4MB的小容量时具有很高的成本效益
NAND Flash
NAND Flash的存储容量比NOR Flash大, NAND结构能提供极高的单元密度,可以达到高存储密度,并且写入和擦除的速度也很快。应用NAND的困难在于flash的管理和需要特殊的系统接口。
EMMC
eMMC (Embedded Multi Media Card),即嵌入式多媒体卡,是MMC协会订立、主要针对手机或平板电脑等产品的内嵌式存储器标准规格。eMMC由Nand flash、Nand flash控制器以及标准接口封装组成。
EEPROM
E2PROM电可擦除,如学习单片机时用到的AT24C02芯片,大小为2K,用于保存少量掉电不丢失的数据,单片机通过IIC来读写这个EEPROM的内容
数据ID
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