The **FT51AL-R** is a high-performance, low-power 8051-core based microcontroller (MCU) developed by FTDI (Future Technology Devices International). It is specifically designed for USB-to-peripheral bridging and sensor hub applications. Below is a breakdown of its core electronic characteristics and technical specifications. --- ## 1. Core Architecture The FT51AL-R utilizes a modified 8051 architecture designed for high-speed execution and efficient power management. | Component | Specifications | | :--- | :--- | | **Core** | Enhanced 8051 (Single Cycle) | | **Clock Speed** | Up to 48 MHz | | **Flash Memory** | 16 KB (Application Storage) | | **Data RAM** | 8 KB (SRAM) | | **USB RAM** | 2 KB (Dedicated for USB FIFO) | --- ## 2. USB Interface Capabilities The primary selling point of the FT51A series is its robust USB integration. * **USB 2.0 Full Speed:** Supports data rates up to 12 Mbps. * **Endpoints:** Supports up to 8 bi-directional endpoints. * **USB Engine:** Integrated PHY and Serial Interface Engine (SIE), eliminating the need for external USB components. * **Battery Charging:** Supports USB Battery Charging Specification v1.2 (Detection of Dedicated Charging Ports). --- ## 3. Peripheral Interfaces (I/O) The "R" suffix typically refers to the package type (usually SSOP-28), which dictates the available pinout for the following peripherals: ### Serial Communication * **UART:** Up to 1 Mbps with flow control. * **I2C:** Master/Slave functionality up to 400 kHz (Fast Mode). * **SPI:** Master/Slave functionality with high-speed support. ### Analog & Timing * **ADC:** 10-bit resolution with multiple channels. * **PWM:** Integrated Pulse Width Modulation for motor or LED control. * **Timers:** 16-bit timers for general-purpose timing tasks. --- ## 4. Electrical Specifications Efficient power consumption makes it suitable for bus-powered USB devices. | Parameter | Value | | :--- | :--- | | **Supply Voltage (VCC)** | 3.0V to 5.5V | | **I/O Pin Voltage** | 1.8V to 3.3V (Logic levels) | | **Active Current** | ~20 mA at 48 MHz | | **Suspend Current** | < 500 µA (Low power mode) | | **Temperature Range** | -40°C to +85°C (Industrial Grade) | --- ## 5. Typical Application Areas * **USB Sensor Hubs:** Connecting analog sensors to a PC via USB. * **Human Interface Devices (HID):** Custom keyboards, mice, or game controllers. * **Instrumentation:** Data loggers and portable measurement tools. * **Bridges:** Converting legacy UART/SPI/I2C protocols to USB. ---