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RL-ARM User's Guide
RL-RTX 
RL-FlashFS 
Technical Data NAND Flash Translation Layer Embedded File System Memory Organization Allocation Information File Data Fragments 
Configuring RL-FlashFS 
Source Files Configuration Options File System Flash Drive SPI Flash Drive RAM Drive Memory Card Drive USB Flash Drive NAND Flash Drive Using RL-FlashFS Using Flash Devices Flash Driver Sector Layout Converting FlashPrg.c Converting FlashDev.c Limitations When Using Internal Flash Using SPI Flash Devices SPI Flash Driver SPI Sector Layout Using RAM Devices Using Memory Card Devices MCI Driver SPI Driver Using FlashFS with USB Devices FAT Driver Using NAND Devices NAND Driver NAND Page Data Layout Function Overview File I/O Routines File Maintenance Routines File Time Support Routines Flash Driver Routines FAT Driver Routines MCI Driver Routines SPI Driver Routines NAND Driver Routines IOC Interface Routines System Routines 
RL-TCPnet RL-CAN RL-USB Example Programs Library Reference AppendixFile Data Fragments
File Data Fragments are of variable size and are fully defined through the file allocation information record.
To make optimum use of the Flash Block, create big file fragments to reduce the total number of file fragments. It is not optimal to open a file for appending or writing a byte to it and close the file. This approach creates huge file allocation information records, which consumes 12 bytes of Flash in total; 8 bytes for the file allocation information and 4 bytes for the information. In addition, such an approach creates slow access times to files.
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