It is available reading some configuration information required by control process from external FLASH memory through SPI interface and writing data records in the memory.

控制过程中所需的一些配置信息可通过SPI接口从外部FLASH存储器读取，所需记录的数据也可写入该存储器中。

youdao

The top layer is a 48 GB cache for organizing the writing of data for better utilization of the flash memory in the other layers.

FORBES: Explosive Growth in Flash Memory Enterprise Applications