User`s guide

Firmware Features
AT85C51SND3Bx Firmware User’s Guide 2-7
7691A–MP3–08/07
– create
– delete
– rename
 Disk management
– disk Information
– format: FAT12, FAT16, FAT32
2.9.2 Configuration  Supported file systems
 Maximum number of files to manage at same time
 Cache optimization
2.10 Nand Flash This module is the Nand Flash memory library.
2.10.1 Features  Support Nand Flash SLC small or large blocks (16KB or 128KB)
 10MB read / 7MB write with 1 Nand Flash
 Physical system area
– code with redundancy
– codecs with redundancy
– pictures
– fonts
 Logical data area
– proprietary wear-levelling algorithm with ECC management
– settings segment: user reserved data
– secure disk segment: mass storage disk for Data disk security management
– data disk segment: mass storage disk
2.10.2 Configuration  Nand Flash auto-detection (average performance)
 Nand Flash part number (best performance)
 Number of devices: 1, 2, 4
2.11 MMC
®
SD
®
Cards This module is the memory card library.
2.11.1 Features  MMC cards:
– V3 in 1-bit mode at 20 MHz
– V4 in 4-bit mode at 24 MHz
 SD cards:
– SD 4-bit mode at 24 MHz
– SD HC 4-bit mode at 24 MHz