8-bit

Microcontrollers

Application Note

Rev. 8195A-AVR-04/09

AVR469: MC301 Hardware User Guide

Features

• Motor Control device bo ard for ATtiny861

• Modular system with 2.54mm pin header connector fo r power board MC300

• Sensor & sensorless modes capabilities

• Hall sensor header, Potentiometer for motor control

• Headers for Atmel

DB101 Display module

• USB interface for PC connection and usage of Atmel

Motor Control Center

software

• ISP & debug interface for both ATtiny861 & USB device.

• Electric specifications:

- Supplied with Power board like MC300 from 3.3V up to 5V

• Dimension: 100x100mm

1 Introduction

The MC301 is the device board for ATtiny861 AVR

microcontroller which can be

connected to the general-purpose power stage board MC300 for driving brushless

DC, brushed DC and stepper motors. This board is also designed to be connected

on any other driver board which could share the same interface. Power and all

signals needed for a power stage board are available on the right side of the board.

Jumpers allow demonstrating sensor or sensorless modes of motor control. Finally,

interface like USB or Atmel DB101 Displ ay module is also available.

Figure 1-1. MC301 Motor control ATtiny861 processor board.

AVR469

8195A-AVR-04/09

2 Hardware overview

Please refer to schematics, layout and BOM available at http://www.atmel.com.

The MC301 motor control processor bo ard is a ATtiny861 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 allow for sensorless control

mode with this particular ATtiny861.

A potentiometer enables the user to control the motor: speed & direction in sensor

mode and speed only in sensorless mode.

A Two Wire serial Interface (TWI) (compatible with Philips' I

C protocol) 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 visualizat ion 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 connect or for the power boards like MC300.

Both microcontrollers: ATtiny861 & AT90USB1287 have their own debug/ISP

interface for user’s specific developments.

Test points either mounted or not, are also available for instrumentation.