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 sensor-less or sensor configuration. External comparators present on the board or internal comparators of the ATxmega128A1 allow for sensor-less control mode.
A potentiometer enables the user to control the motor: speed & direction in sensor mode and speed only in sensor-less 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-specific developments.
Test points either mounted or not, are also available for instrumentation.