• sales

    +86-0755-88291180

2.7inch e-Paper HAT (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 Pico 2 RP2350 4inch LCD CAN RS485 QMI8658 Development Board 480x480 TouchScreen Display LVGL HMI I2C Sensor LuckFox SC3336 Raspberry Pi Pico W Raspberry Pi Zero Pi0 2W Digital Photo Frame 7.3 inch E6 Full Color E Paper Ink Calendar Art Poster ESP32 Development Board WiFi+Bluetooth Ultra Low Power Dual Core ESP 32S ESP 32 Similar ESP8266 Raspberry Pi 5 5V5A Power Vertical Drag Instructions 1.83inch LCD TouchScreen Display 240×280 NV3030B Arduino Raspberry Pi ESP32S3 Pico STM32 Raspberry Pi 5 Active Cooler Raspberry-Pi-GPIO-Audio-amplification-PWM-Sound-Card-Speaker-Buzzer Raspberry Pi Pico 2 RP2350 bit board Size & Port high Compatible With BBC Micro:bit RP2040-PiZero DeepSeek XiaoZhi AI Voice Chat ESP32-S3 All-in-One-PCB-Kit N16R8 WROOM-1-N16R8 DevKitC-1 Development Board DC-DC Step-Down Mini voltage Moudle Input 5~36V voltage Output 5V/3.3V 4A NV3030B Raspberry Pi Pico 2 RP2350B Industrial 8-Channel Relay IOT LAN Digital Input DIO /RS485 /RJ45 Ethernet /POE ESP32-S3 1.69inch LCD Display With QST Attitude Gyro Sensor QMI8658C For Arduino Python Raspberry Pi 5 Serial Raspberry Pi 5 USB A C Mini PD Trigger Activation Power Adapter To Solve Non-PD-Power system error warning NVIDIA Jetson Orin Nano/NX PoE Mini Expansion Board Power over Ethernet RJ45 802.3af compliant