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RA8875

SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries # SPDX-License-Identifier: MIT # Quick test of RA8875 with Feather M4 import time import board import busio import digitalio from adafruit_ra8875 import ra8875 from adafruit_ra8875.ra8875 import color565 BLACK = color565(0, 0, 0) RED = color565(255, 0, 0) BLUE = color565(0, 255, 0) GREEN = color565(0, 0, 255) YELLOW = color565(255, 255, 0) CYAN = color565(0, 255, 255) MAGENTA = color565(255, 0, 255) WHITE = color565(255, 255, 255) # Configuration for CS and RST pins: cs_pin = digitalio.DigitalInOut(board.D9) rst_pin = digitalio.DigitalInOut(board.D10) int_pin = digitalio.DigitalInOut(board.D11) # Config for display baudrate (default max is 6mhz): BAUDRATE = 6000000 # Setup SPI bus using hardware SPI:

The RA8875 is an electronic component from Adafruit. SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries # SPDX-License-Identifier: MIT # Quick test of RA8875 with Feather M4 import time import board import busio import digitalio from adafruit_ra8875 import ra8875 from adafruit_ra8875.ra8875 import color565 BLACK = color565(0, 0, 0) RED = color565(255, 0, 0) BLUE = color565(0, 255, 0) GREEN = color565(0, 0, 255) YELLOW = color565(255, 255, 0) CYAN = color565(0, 255, 255) MAGENTA = color565(255, 0, 255) WHITE = color565(255, 255, 255) # Configuration for CS and RST pins: cs_pin = digitalio.DigitalInOut(board.D9) rst_pin = digitalio.DigitalInOut(board.D10) int_pin = digitalio.DigitalInOut(board.D11) # Config for display baudrate (default max is 6mhz): BAUDRATE = 6000000 # Setup SPI bus using hardware SPI:. View the full RA8875 datasheet below including specifications and datasheet sections.

Manufacturer

Adafruit

Overview

Part: RA8875 Touch Display Driver Board — Adafruit Type: TFT Display Driver Board Description: A powerful TFT driver board featuring the RA8875 chip, capable of controlling displays up to 800x480 pixels with hardware-accelerated graphics and resistive touchscreen support via SPI.

Operating Conditions:

  • Supply voltage: 3–5 VDC
  • Output voltage (3Vo): 3.3 V
  • Output current (3Vo): 100 mA (minimum)

Absolute Maximum Ratings:

Key Specs:

  • Display resolution: Up to 800x480 pixels
  • Onboard RAM: 768 KB
  • Logic compatibility: 3-5 V
  • Backlight booster output: 25 mA or 50 mA at up to 24 V
  • SPI baudrate (CircuitPython): 6 MHz (max stable)
  • Level shifter propagation delay: ~10 ns (CD74HC4050)

Features:

  • Supports 4", 5", or 7" TFT displays
  • Hardware-accelerated shapes (lines, rectangles, triangles, ellipses, round-rects)
  • Built-in English/European font set
  • 4-wire resistive touchscreen support with IRQ pin
  • Onboard 3.3V regulator
  • Constant-current backlight booster
  • Level shifting for 3-5V logic compatibility
  • MISO tristate circuit (Rev E and later)

Applications:

  • Driving large TFT screens with microcontrollers lacking native display drivers
  • Adding resistive touch input to display projects

Package:

  • Breakout board with header pins
  • 40-pin FPC connector for TFT display

Related Variants

The following components are covered by the same datasheet.

Part NumberManufacturerPackage
RA8875L3T——
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