2
AVR1014
8296A-AVR-03/10
2 Hardware overview
Please refer to schematics, layout and BOM available at http://www.atmel.com.
The MC303 motor control processor board is an ATxmega128A1 AVR microcontroller
solution connected to a power stage board intended for driving
DC motors (Brushless
or brushed)
. All signals coming from the power stage board are connected to the
microcontroller either directly or through jumpers for sensorless or sensor
configuration. External comparators present on the board or internal comparators of
the ATxmega128A1 allow for sensorless control mode.
A potentiometer enables the user to control the motor: speed & direction in sensor
mode and speed only in sensorless mode.
A Usart to USB bridge is available to transfer motor control status & commands to a
PC software interface: Atmel Motor Control Center.
Three 2.54mm headers are available to add the Atmel DB101 Display module in
order to enhance visualization of motor control data & commands.
Three 8-pin & one 16-pin 2.54mm (100mil) horizontal male pin headers on the right
side of the board form a system connector for the power boards like MC300.
Both microcontrollers: ATxmega128A1 & AT90USB1287 have their own JTAG
interface for user’s specific developments.
Test points either mounted or not, are also available for instrumentation.
