ALFAT-OM-337 GHI Electronics, ALFAT-OM-337 Datasheet - Page 8

• Manufacturer Part Number: ALFAT-OM-337
• Description: Memory IC Development Tools ALFAT USB / SD to UART / SPI OEM BOARD
• Manufacturer: GHI Electronics

Specifications of ALFAT-OM-337

• Rohs: yes
• Product: SD OEM Board
• Tool Is For Evaluation Of: SD, SDHC, MMC Cards, USB drives
• Memory Type: Flash
• Operating Supply Voltage: 3.3 V
• Description/function: OEM board offers a seamless way to access files on SD & MMC cards and on USB memory drives
• Interface Type: I2C, SPI, UART, USB
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Part # Aliases: GHI-ALFAT-OM-337

The function of the commander is to provide the user with a protocol and a set of
commands to control the processor and access the files on the storage devices.
The physical interface that the user (the host system) can use to access the commander is
UART, SPI or I2C serial port.
Commands are human-readable ASCII format. This allows for easier development and
troubleshooting. But at the same time, the commands are designed to be easy to parse by
the the host software.
The function of the file system engine is to handle accessing the file system according to
FAT standards. It has been optimized for high speed access and with high performance.
Here are some of the capabilities of this engine:
It is important to note here that the 16 file handle limit is only on how many simultaneous
files are open. ALFAT SoC processor Has no limits on how many files can be opened and
closed.
ALFAT SoC processor includes memory card driver
internally that supports SD, SDHC and MMC cards. This
gives ALFAT the ability to access a wide range of
memory cards such as standard or high capacity
SD/μSD cards or multimedia cards. There is no limit on
the card capacity.
Unlike typical solutions that access the card through
SPI-based interface, ALFAT's hardware provides a 4-bit
SD bus interface for higher performance.
2.1. Commander
2.2. FAT File System Engine
2.3. Memory Card Access (SDHC, SD or MMC)
GHI Electronics
Rev. 1.13
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FAT16, FAT32.
Licensed Long File Names support. Licensed to be used on ALFAT by Microsoft.
Access up to 16 opened files simultaneously.
Complete directories (folders) support.
File access functions include read, write, append, seek, tell, find, delete, remove
folder ...etc.
High speed read or write access, up to 4000KBytes/sec.
No limits on media size, file size or file/folder count.
Page 8 of 51
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ALFAT SoC Processor
www.ghielectronics.com
Architecture