Description for Due is a microcontroller board based on the SAM3X8E CPU. It is the first for based on the 32-bit ARM core. It has 54 digital IO ports (12 of which can be used for PWM output), 12 analog input ports, 4 UART hardware serial ports, 84 MHz clock frequency, a USB OTG interface, two (analog-to-digital conversion), two TWI, a power socket, an SPI interface, a JTAG interface, a reset button and an erase button. The circuit board already contains all the components required for control operation. You only need to connect it to a computer via USB or connect it to a power socket via an AC-DC adapter or battery to start the controller running. for Due is compatible with for expansion boards that work at 3.3V and have a pinout that conforms to the 1.0 for standard. Production microcontroller: AT91SAM3X8E Operating voltage: 3.3V Input voltage (recommended): 7-12V Input voltage (limit): 6-20V Digital I/O pins 54 (including 12 PWM outputs) Analog input channels Pins 12 Analog output channels Pins 2 () Total output current of I/O port: 130 mA 3.3V port output capacity: 800 mA 5V port output capacity: 800 mA Flash 512 KB (all space can store user programs) 96 KB (two parts: 64KB and 32KB) Clock rate: 84 MHz Different batches may have different printed characters, but it not affect the use Color: Blue Material: PCB Package Contents: 1 x Main Control Board 1 x cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.