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Pixy-mega128-sdram-hat

Specification

  • SDRAM hat for Pixy-mega128-0.
  • EXPERIMENTAL circuit board, designed for learning SDRAM.
    • Not suitable for application use because Arduino (ATMega128A) cannot control it at a practical level.
    • Lack of any capacitors and position is undesirable. Therefore, high-speed access is not possible.
  • SDRAM: ELPIDA EDS1216AGTA (16MB: 8Mwords * 16bits)

PCB (Hat on Pixy-mega128-0)

PCB

Note

  • Errata: The header is slightly misaligned in version 0. You must force this board to be inserted onto Pixy-mega128-0.
  • You have to connect both VCC and GND before connect USB. See the picture. Pixy-mega128-sdram-hat-0-power

Sample code

SdramHat: PlatformIO project. Will test SDRAM initialization and write-to-read.