ALFAT-OM-337 GHI Electronics, ALFAT-OM-337 Datasheet - Page 41

• 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

7. Hardware integration guide
The schematic provided on ALFAT web-page in an excellent reference design. This section
provides further details.
Power source is a main cause of many problems. ALFAT SoC
is capable of running at lower voltage or somewhat noisy
voltage source. The media may or may not work on an
unstable power source. Make sure that the power source to the
storage media is reliable and there is a large enough capacitor
as close as possible to the media power pins. We recommend
adding 0.1uF and 22uF capacitors.
ALFAT's main clock is provided through
a 12Mhz Crystal with 500PPM or less
and a load capacitance around 18pF.
Real Time Clock crystal's value should be 32.768Khz and the load capacitance is 12.5pF.
7.1. Power Source
7.2. Crystals
GHI Electronics
Rev. 1.13
Page 41 of 51
Hardware integration guide
ALFAT SoC Processor
www.ghielectronics.com