ALFAT-OM-337 GHI Electronics, ALFAT-OM-337 Datasheet - Page 19

• 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

5. ALFAT Command Set
All commands are in ASCII format. A terminal programs can be used to enter all
commands manually to evaluate the commands. Note that the data exchanged with the
files do not have to be in ASCII format. This data is transferred as is.
When ALFAT is done processing a command it will always return an error code in this form
“!xx\n” where xx is the error number. If a command returns some information, then it will be
the user expects a $ symbol followed by the information, unless otherwise is noted.
You can send multiple commands to ALFAT SoC until its FIFO is full (indicated by BUSY or
RTS). ALFAT will process one at the time in the same order.
General command notes:
GHI Electronics
Rev. 1.13
Command Description
●
●
●
@
G
Q
V
S
B
E
K
N
Z
T
#
J
Any command with its argument can not exceed 200 bytes. This is not related to the
4096 byte data FIFO.
Commands are terminated with line-feed and ALFAT returned data termination is
line-feed as well. However, ALFAT will accept carriage-return instead of line feed,
but not both.
The user must read back the responses for each command properly and check
whether the command was successful.
Get version number
Low power
Initialize Real Time Clock
Set current time and date
Get current time and date
Change Baud rate
Enable echo
Read status register
Test media
Get free size
Initialize directory list
Get next directory entry
Format
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Command Description
W
M
O
R
C
D
P
Y
A
F
?
L
I
Initialize MMC/SD or USB
Open file to a free handle
Write to a file
Read from a file
Flush file
Close file
File seek
File tell
Delete file or folder
Find file or folder
Copy From File to Another
Rename file
Fast Write to file (SPI only)
ALFAT SoC Processor
ALFAT Command Set
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