Adafruit eInk Breakout Friend 32KB SRAM engineering development tool

Adafruit eInk Breakout Friend 32KB SRAM

This development tool provides the power supply support circuitry and level shifting required to connect a standard 24-pin eInk display up to 4.2 inches. It includes 32KB of SRAM so you can prepare frame buffers before transferring data to the display. The board shares the SPI port used by the display, requiring only one additional connection. It is intended for engineers and hobbyists prototyping with tri-color eInk panels up to 300x400 resolution.

Who this suits and who should look elsewhere

This breakout suits developers building prototypes with compatible 24-pin eInk displays who need integrated voltage management and a local frame buffer. It is not for buyers who want a display included in the package. It is also not for projects that require driving displays larger than 4.2 inches or resolutions higher than 300x400.

Key specification: 32KB SRAM frame buffer

The onboard 32KB SRAM holds a full frame buffer for a 300x400 tri-color panel, which requires approximately 30KB per image. This capacity lets you compose the entire display content in memory before initiating the write-only transfer to the eInk panel. If your application needs to buffer multiple frames or larger images, this SRAM size will be insufficient.