Joe-Ming Cheng and Ping Hsu IBM and San Jose State University
IBM and San Jose StateUniversity

Typical AVR microcontroller applications are signal sensing, data acquisition, motion control, lab automation, and instrument/equipment control. Many mechanical systems, for example, have less than 10- khz bandwidth. The AVR microcontrollers, clocking at 4 to 16 MHz, can facilitate fairly extended realtime control functions. AVR microcontroller has an 8-bit RISC core with built-in programmable IO ports, multi-channel ADC and DAC, serial interface, timers and counters, and pulse-with modulation generation for motor speed control. AVR also has built-in Flash memory for storing program and SRAM for run-time data store. Software/Hardware Codesign process with AVRStudio, HW development board, and external interface hardware are discussed in this paper.