Some time ago now I presented the design, development board and software driver for an add-on to the Arduino Mega that gave it access to 448Kb of additional SRAM arranged in 8 banks of 56Kb. My design was realised by a compact add-on board that plugged into the relevant block of pins on the...
512Kb SRAM expansion for the Arduino Mega (design)
posted by Andy
Often when prototyping with an Arduino you run into the memory limitations inherent in a microcontroller programming environment. The Arduino Mega series goes a long way to solving the program size issues, offering as it does 128Kb and 256Kb formats. But what about the SRAM? Even the mega only...
512Kb SRAM expansion for the Arduino Mega (build)
posted by Andy
The second in this series of articles covers the PCB design and build process for the memory expansion board The Eagle board layout The board layout The signal lines are 10mil wide and the power lines are 16mil. I hand routed some of the power lines myself and then let Eagle’s...
512Kb SRAM expansion for the Arduino Mega (software)
posted by Andy
The final part of this series of blog posts will present some open source software that you can use to exploit the new memory space. You can download the library source code from my downloads page. The xmem library I’ve put together a collection of functions into a library that you can...
