The VEX Robotics US headquarters will be closed on Friday, July 3, 2015, in observance of the US Independence Day holiday. Sales and technical support responses will be delayed.

We will reopen on Monday, July 6, 2015. VEX wishes everyone a safe and happy holiday weekend!

Skip to Main Content »

VEX Robotics
Ships From:

Category Navigation:

VEX ARM® Cortex®-based Microcontroller

 VEX ARM® Cortex®-based Microcontroller

Hover to View, Click to Zoom

  • VEX ARM® Cortex®-based Microcontroller top-view (VEXnet Key 2.0 not included)
  • VEX Cortex Microcontroller side view

VEX ARM® Cortex®-based Microcontroller

P/N: 276-2194

If you could make yourself smarter, wouldn't you?

The VEX ARM® Cortex®-based Microcontroller coordinates the flow of information and power on the robot. All other electronic system components must interface to the Microcontroller.

  • STMicroelectronics ARM® Cortex® M3 user processor
  • Wireless with built-in VEXnet technology
  • (8) Standard 3-wire Motor ports
  • (2) 2-wire Motor ports
  • (1) I2C "smart sensor" port
  • (2) UART Serial Ports
  • (8) Hi-res (12-bit) Analog Inputs
  • (12) Fast digital I/O ports which can be used as interrupts
  • Programmable with easyC v4 or ROBOTC for VEX Robotics v4.x

In stock

Add Items to Cart

You may also be interested in the following product(s)

Product Name P/N: Availability Price Qty
VEXnet System Bundle 276-1604
In stock
VEXnet Key 2.0 276-3245
Ships in 1 Week


The VEX ARM® Cortex®-based Microcontroller coordinates the flow of all information and power on the robot. It has built in bi-directional communication for wireless driving, debugging and downloading using the VEXnet wireless link. The Microcontroller is the brain of every VEX robot.

Built-in VEXnet Technology: Wireless driving, wireless debugging, and wireless downloading. Compatible with either the first generation VEXnet USB Key or the new VEXnet Key 2.0.

Motor Ports: (8) standard 3-wire Motor or Servo ports. (2) 2-wire Motor ports.

I2C Smart Sensor Port: Will connect to multiple new smart sensors in the future.

UART Fast Serial Ports: Connects to the VEX LCD Display (19,200 baud) and will have future support to 1.125 Mbaud

Digital/Analog Input Ports: (8) high-res Analog Inputs, (12) fast Digital I/Os that can be used as interrupts.

Rx1 and Rx2 Ports: Also support for two 75MHz crystal transmitters and receivers

Battery Ports: Connect 7.2V power sources, such as the Battery Holder or the VEX 7.2V Robot Battery. Also connect a 9V Backup Battery to protect against communication losses.

Technical Specifications

Kit Contents (1) VEX ARM® Cortex®-based Microcontroller
Downloads & Docs Documentation
VEX ARM® Cortex®-based Microcontroller / VEXnet Joystick User Guide
VEX Robot Troubleshooting Flow Charts
VEX ARM® Cortex®-based Microcontroller Pinout Guide
Bootlader & Firmware Change Log
Battery In
  • Voltage:7.2 volts nominal, 5 to 12 volts min/max.
  • Type:Six AA batteries or 7.2V Robot Battery
  • Current:150mA for Controller & Receiver plus Motors, Servos & VEXnet
I/O Ports (8) 3-wire Motor Outputs
  • Usage:For 3-wire VEX motors, Motor Controller 29s or servos
  • Type:Hobby standard PWM
  • Refresh:Every 18.5 mSec

(2) 2-wire Motor Outputs
  • Usage: For 2-wire VEX motors
  • Type:H-Bridge
  • Refresh:Every 1 mSec

  • (1) I2C "Smart Sensor" Port
    • Usage:Future I2C Products

    (2) UART Serial Ports
    • Usage:VEX LCD Module

    (8) 12-bit Analog Inputs
    • Analog In:12-bit resolution. 10 μSec access time.

    (12) Fast Digital I/O (can be used as interrupts)
    • Digital In:150 kHz input frequency.

    (1) DAC Speaker Output
    • Usage:Output sound, voice, music to an external speaker

    (2) Rx1 & Rx2
    • Usage:Connects to (2) 75MHz receivers.
Microcontroller STMicroelectronics ARM® Cortex® M3
  • Speed:90 MIPS (Million Instructions Per Second)
  • RAM:64KB
  • Flash:384KB program space
Programming easyC V4
ROBOTC for VEX Robotics v4.x
Size 4.5in W x 3.9in L x 1in H
  • 0.302 lbs (137 grams)
    • Actual weight one item (no packaging)

My Cart

You have no items in your shopping cart.