VEX Microcontroller - VEX Robotics

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PIC Microcontroller V0.5

P/N: 276-2170

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

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Overview

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.

Motors 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 for 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.

Technical Specifications

Kit Contents	(1) VEX Microcontroller (5) Jumpers
Downloads & Docs	Inventors Guide - Logic Documentation Downloads
Battery In	Voltage:7.2 volts nominal, 5 to 12 volts min/max. Type:Six AA batteries or 7.2V Robot Battery Current:62 mA for Controller & Receiver plus Motors & Servos
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
Programming	easyC ROBOTC Microchip MPLAB IDE
Size	4.5in W x 3.9in L x 1.1in H
Weight	VEX Microcontroller.278 lbs (126 grams) Actual weight one one item (no packaging)