Rockchip

Rockchip Vendor Storage

Vendor storage is designed for stored SN, MAC and other vendor data.

Posted by LXG on September 2, 2022

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

vendor_storage

存储结构

data_layout

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

vendor_data_id

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