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PIC Microcontroller V0.5

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PIC Microcontroller V0.5


The "brains" of the robot.

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

  • Wireless with the 75MHz receiver and transmitter
  • Microchip user processor
  • (8) Motor ports
  • (16) Digital I/O, Analog In
  • (6) Interrupt I/O
  • (1) Serial Port
  • Programmable with easyC, ROBOTC, or MPLAB

Discontinued. We recommend the VEX ARM® Cortex®-based Microcontroller as a replacement option.


Availability: Discontinued




The VEX Microcontroller coordinates the flow of information and power on the robot. All other electronic system components must interface to the Microcontroller and function as a cohesive unit. The Microcontroller contains the robot's program and processes all signals received from both human operators and onboard sensor systems. It also manages power allocation on board the robot, and directly controls the motors.

Motor Ports: Connect up to (8) VEX motors or servos.

Interrupt Ports: Interrupts are digital inputs designed for high priority signals that need immediate attention from the Microcontroller.

Digital/Analog Input Ports: 16 multipurpose input/output ports for sensors.

TX/RX Ports: Allow the user to communicate directly with the user processor inside the Microcontroller via a TTL serial port.

Serial Port: Use with the VEX Programming Kit to re-program the Microcontroller.

Rx1 and Rx2 Ports: Connect radio receivers to communicate with the Microcontroller wirelessly from a Transmitter.

Battery Port: Connect a 7.2V power sources, such as the Battery Holder or the VEX 7.2V Robot Battery.

Kit Contents
  • (1) VEX Microcontroller
  • (5) Jumpers
  • Docs & Downloads
    CAD File
    I/O Ports
    I/O Ports:
    (8) Motor Outputs
  • Usage - For VEX motors or servos
  • Type - Hobby standard PWM
  • Refresh - Every 18.5 mSec

  • (16) Digial I/O, Analog In
  • Digital In - 50 KHz input frequency
  • Analog In - 10-bit resolution. 10 μSec access time
  • I/O Schematic - Schematic

  • (6) Interrupt I/O
  • Usage - Measuring Input changes via software interrupt

  • (1) Tx/Rx Port
  • Type - TTL Serial
  • Speed - 115Kb
  • Label - TX and RX

  • (1) Serial Port
  • Usage - Used for reprogramming and debugging
  • Speed - 115Kb

  • (2) Rx 1 & Rx2
  • Usage - Connects to (2) 75MHz receivers

  • Microcontroller: Microchip PICmicro PIC18F8520
  • Speed: - 10 MIPS (Million Instructions Per Second)
  • RAM: - 1800 bytes + 1024 bytes EE2
  • Flash - 32K program space

  • Weight
    .278 lbs (126 grams)
    4.5in W x 3.9in L x 1.1in H
    Other Info
    Battery In:
  • Voltage - 7.2 volts nominal, 5 to 12 volts min/max
  • Type - Six AA batteries, 7.2v Robot Battery 2000 mAh or 7.2v Robot Battery 3000 mAh
  • Current - 62 mA for Controller & Receiver plus Motors & Servos