The **FT813Q-R** is an advanced Embedded Video Engine (EVE) chip developed by Bridgetek (formerly FTDI Chip). It is designed to offload high-quality Graphic User Interface (GUI) processing from a system's primary microcontroller (MCU). --- ## 1. Core Technical Specifications The FT813 is part of the second-generation EVE family, featuring enhanced memory and performance compared to the original FT800 series. | Parameter | Specification | |:---|:---| | **Manufacturer** | Bridgetek / FTDI | | **Package** | VQFN-48 (7mm x 7mm) | | **Graphics Controller** | EVE2 Technology | | **Internal Memory** | 1 MB RAM | | **Display Resolution** | Up to 800 x 600 pixels | | **Color Depth** | 24-bit (True Color) | | **Touch Support** | Capacitive (Multi-touch up to 5 points) | | **Interface** | SPI (up to 30MHz) or QSPI | --- ## 2. Key Functional Blocks The FT813Q-R integrates three major functions into a single silicon die: ### A. Graphics Engine (Display) The chip uses an object-oriented approach. Instead of the MCU sending every pixel to the screen (which is slow), the MCU sends high-level commands (e.g., `Draw_Button`, `Play_Video`). * **Video Playback:** Support for MJPEG video. * **Image Assets:** Supports PNG, JPEG, and compressed textures. * **Alpha Blending:** Enables professional transparency and anti-aliasing. ### B. Touch Controller Specifically designed for **Capacitive Touch Panels (CTP)**. * Unlike the FT812 (which is for resistive touch), the FT813 supports multi-touch. * It includes an I2C master interface to communicate directly with external capacitive touch sensors (like FocalTech or Goodix controllers). ### C. Audio Engine * Generates MIDI-like sounds and 8-bit PCM audio playback. * Built-in sound synthesizer for UI feedback (beeps, clicks, and alarms). * PWM output for driving a small speaker via an external amplifier. --- ## 3. Pinout and Hardware Integration The FT813Q-R is a 48-pin device. Key pin groups include: * **SPI/QSPI Interface:** `SCK`, `MISO`, `MOSI`, `CS_N`, `IO2`, `IO3`. This is how it talks to your ESP32, STM32, or Arduino. * **RGB Video Interface:** `R[7:0]`, `G[7:0]`, `B[7:0]` plus timing signals (`PCLK`, `DE`, `VSYNC`, `HSYNC`). * **Touch Interface:** `CTP_SCL`, `CTP_SDA`, `CTP_RST_N` for connecting to the screen's touch overlay. * **Power:** Typically requires **3.3V** for VCC/VCCIO. --- ## 4. Why Use the FT813Q-R? 1. **Low MCU Overhead:** Even a simple 8-bit Arduino can drive a complex 800x480 UI because the FT813 does all the rendering. 2. **Memory Efficiency:** By using high-level commands and compressed assets, you save flash space on your main controller. 3. **Single Chip Solution:** Replaces a discrete graphics controller, touch IC, and audio DAC. ---