• sales

    +86-0755-88291180

2.7inch e-Paper (B)

Introduction


Note:
 The raw panel require a driver board, If you are the first time use this e-Paper, we recommend you to buy the HAT version or buy more one driver hat for easy use, otherwise you need to make the driver board yourself. And this instruction is based on the version with PCB or driver board.

264x176, 2.7inch E-Ink display HAT for Raspberry Pi, three-color


Interfaces


VCC3.3V
GNDGND
DINSPI MOSI
CLKSPI SCK
CSSPI chip select (Low active)
DCData/Command control pin (High for data, and low for command)
RSTExternal reset pin (Low for reset)
BUSYBusy state output pin (Low for busy)


Working principle


Introduction


This product is an E-paper device adopting the image display technology of Microencapsulated Electrophoretic Display, MED. The initial approach is to create tiny spheres, in which the charged color pigments are suspending in the transparent oil and would move depending on the electronic charge. The E-paper screen display patterns by reflecting the ambient light, so it has no background light requirement. Under sunshine, the E-paper screen still has high visibility with a wide viewing angle of 180 degree. It is the ideal choice for E-reading.


Communication protocol






Note: Different from the traditional SPI protocol, the data line from the slave to the master is hidden since the device only has display requirement.

  • CS is slave chip select, when CS is low, the chip is enabled.
  • DC is data/command control pin, when DC = 0, write command, when DC = 1, write data.
  • SCLK is the SPI communication clock.
  • SDIN is the data line from the master to the slave in SPI communication.

SPI communication has data transfer timing, which is combined by CPHA and CPOL.

  1. CPOL determines the level of the serial synchronous clock at idle state. When CPOL = 0, the level is Low. However, CPOL has little effect to the transmission.
  2. CPHA determines whether data is collected at the first clock edge or at the second clock edge of serial synchronous clock; when CPHL = 0, data is collected at the first clock edge.
  • There are 4 SPI communication modes. SPI0 is commonly used, in which CPHL = 0, CPOL = 0.

As you can see from the figure above, data transmission starts at the first falling edge of SCLK, and 8 bits of data are transferred in one clock cycle. In here, SPI0 is in used, and data is transferred by bits, MSB first.


TAG: Raspberry Pi 14 inch LCD 2K HDMI /Type C Display Capacitive TouchScreen 2160x1440 For Jetson Nano/mini Computer PC Sipeed SLogic 4IN1 USB Logic Analyzer 80M / DAPLink / CKLink Debugger Tool / UART Module DeepSeek AI Voice Chat ESP32 S3 Development Board 1.83 inch TouchScreen Display 240x284 i5-1135G7 1.3inch LCD 4 inch e Paper HAT+ E Ink Spectra E6 Full-Color 600x400 Screen Display For Arduino /Raspberry Pi /Jetson Nano /STM32 ESP32 C3 LCD Development Board 1.3 inch Display Screen ST7789 240x240 3D Transparent Refractive Prism Mini TV For Arduino Raspberry Pi Camera Module 3 Sensor Assembly IMX708 Official Original 11.9MP Camera Core1121 LoRa LR1121 HF LF SPI For Sub-GHz and 2.4GHz Raspberry Pi DSI ESP32 C6 Development Board 1.43 inch AMOLED QSPI Display 1.43inch TouchScreen Dual MIC AudioI Deepseek N16R8 RS485 to RJ45 ESP32-S3 LCD Industrial Isolation USB TO RS232/485/422/TTL FT232RNL Serial UART Converter 7.5 inch Passive NFC e-Paper V2 BW Display 7.5inch E-ink Screen No Need Battery Wireless Powered Data Transfer For Mobile APP Industrial UART To WiFi RS232 to CAN Raspberry Pi Autofocus Camera ESP32 1.54inch OLED 1.54 inch Passive NFC e-Paper ink (G) RYBW Display Screen No Need Battery Wireless Power & Data Transfer