AVR441: Intelligent BLDC Fan Controller with Temperature Sensor and Serial Interface

AVR441 Intelligent BLDC Fan Controller with Temperature Sensor and Serial Interface. This application describes how to integrate a low-cost, feature-rich AVR microcontroller into the commutator electronics of a BLDC fan. The ATtiny25 used in this application is a low-cost, low-power, 8-bit microcontroller based on the AVR enhanced RISC architecture. It contains 2KB Flash program memory, 128 bytes of EEPROM memory and 128 bytes of SRAM