AVR601: Atmel Modular Evaluation Kits for Motor Control Applications 8-bit 1. Introduction Microcontrollers Following the success of the MC100 and MC200 motor control demonstration kits, Atmel is expanding the support for motor control applications and presents a new modular concept for Motor Control evaluation kits. As shown on figure 1, each motor Application Note application is now supported by two or three evaluation boards: A power board providing the high current to the motor A processor board supporting one AVR microcontroller and the user interface An optional interface board which may be physically inserted between the Power Board and the Processor Board for signal conditioning. Figure 1-1. System Architecture B1 A1 8 8 Processor Interface Power Board Board Board B2 A2 8 8 (Optional for A3 B3 Specific ATtiny861 8 Purpose) 8 MOSFETs ATMega32M SPM ATXmega A4 B4 ... 8/16 8/16 USB 7803AAVR10/08The offering includes one low voltage power board, three processor boards and the associated firmware. These four boards as shown on figure 2: MC300 is the low voltage power board (max 40V). MC301 is the processor board with the low cost ATtinyx61 MC303 is the processor board with the new high performance XMEGA MC310 is the processor board with the ATMega32M1 (with CAN interface) More processor boards will become available in the future Figure 1-2. Motor control Boards offering MC303 MC301 MC300 MC310 The Atmel Motor Control Interface bus (AMCI bus) shown on Figure 1-3, allows the communica- tion between the power board and the processor board most motor types are supported by this interface: BLDC and BLAC motors AC induction motors Switch reluctance motors Stepper motors The AMCI bus uses three 8 bit connectors and one 8/16 bit connector. The interface supports up to four phases (U, V, W, X), each with half bridge control and both voltage and current feedback. With three phase motors, the free X channel can be used for a brake function. The interface also supports Hall sensors, speed, temperature and fault signals and also allows the control of the PFC (Power Factor Correction) from the CPU board. All signals are logic sig- nals or analog signals scaled to reach the digital Vcc. 2 AVR601 7803AAVR10/08