• sales

    +86-0755-88291180

1.54inch e-Paper Module (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.

200x200, 1.54inch E-Ink display module, three-color, SPI interface


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.

  • e-Paper HAT Codes description

  • e-Paper HAT Hardware/software setup
  • TAG: Industrial UART USB TO 8CH RS485 Isolated Converter For 35mm standard rail and stacked installation Raspberry Pi 5 Heatsink Raspberry Pi 5 Fan MPS2.5G Raspberry Pi 5 PCIe to NVME SSD And 2.5G Ethernet RJ45 HAT RTL8125 2280 2242 2230 ESP32 Development Board C3 1.28 inch Round Rotary LCD Smart Screen 1.28inch Knob Display 240x240 LVGL for Arduino RS485 to RJ45 RV1103 SC3336 Raspberry-Pi-Pico-W-webserver Luckfox Pico Max ESP32-S3 Development Board 4 inch LCD TouchScreen Display 480x480 RS485 /SHT20 /Relay For Arduino LVGL 86 TVbox Raspberry Pi 5 TTL Raspberry Pi Transparent Screen ESP32-S3 A7670E 4G development board supports LTE Cat-1/2G/GNSS positioning/WiFi/Bluetooth Computer USB Monitor Screen Jetson Nano Autofocus Camera ESP32 P4 Development Board WIFI6 3.4 inch LCD Round Display 3.4inch TouchScreen 800×800 Dual Microphones CPU Monitor Display Raspberry Pi 5 Cooling Raspberry Pi Pico rp2040 Display image 1.3inch LCD ST7789 change bmp to hex