Waveshare 4.2 inch 400x300 E-Ink Display Module, SPI Interface Overview 1. This is an E-Ink display module, 4.2inch, 400x300 resolution, with embedded controller, communicating via SPI interface. 2. Due to the advantages like ultra low power consumption, wide viewing angle, clear display without electricity, it is an ideal choice for applications such as shelf label, industrial instrument, and so on. Features 1. No backlight, keeps displaying last content for a long time even when power down 2. Ultra low power consumption, basically power is only required for refreshing 3. SPI interface, for connecting with controller boards like Raspberry PiArduinoNucleo, etc. 4. Onboard voltage translator, compatible with 3.3V5V MCUs 5. Comes with development resources and manual (examples for Raspberry PiArduinoSTM32) Specifications 1. Operating voltage: 3.3V~5V 2. Interface: 3-wire SPI, 4-wire SPI 3. Outline dimension: 103.0mm × 78.5mm 4. Display size: 84.8mm × 63.6mm 5. Dot pitch: 0.212 × 0.212 6. Resolution: 400 × 300 7. Display color: black, white 8. Grey level: 2 9. Full refresh time: 4s 10. Refresh power: 26.4mW(typ.) 11. Standby power: <0.017mW 12. Viewing angle: >170 degree 13. Weight: 0.052 kg Interface 1. SYMBOL: DESCRIPTION 2. VCC: 3.3V~5V 3. GND: Ground 4. DIN: SPI MOSI pin 5. CLK: SPI SCK pin 6. CS: SPI chip selection, low active 7. DC: DataCommand selection (high for data, low for command) 8. RST: External reset, low active 9. BUSY: Busy status output, low active Package contents 1. 4.2inch e-Paper Module x1 2. PH2.0 20cm 8Pin x1