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Overview

A tiny RAM expansion board offering 4Mbit (512K bytes) of memory storage accessible by the SPI 4-wire interface.

Module pins include power, ground, chip select, SCLK, MISO, MOSI. Power supplied can be for a 2.5V or 3.3V interface.

Microcontrollers and boards like Arduino and Digilent often have very limited amounts of program memory leaving very little left over for storing user data such as graphics, audio or other user data. By using a RAM expansion module you can

• run more complex programs by keeping processor on-chip memory reserved for program variables
• avoid wearing out FLASH memory which has a limited number of lifetime write cycles.

Compare the 512 KBytes of RAM to:

• Arduino Uno = 2 KB
• Arduino Mega 2560 = 8KB
• Arduino Due = 96 KB

Pinout

Module is plug-in compatible with Digilent PMOD interface but can be used with any board by properly connecting the signals on the memory module.

1 - CSn - active low chip select

2 - MOSI

3 - MISO

4 - SCLK

5 - GND

6 - VDD