General Description

The HT45FM03B is 8-bit, high performance, RISC architecture microcontroller device which includes a host of fully integrated special features specifically designed for brushless DC motor applications.

Features

• Operating voltage: fSYS= 0.4~20MHz: 4.5V~5.5V

• 26 bidirectional I/O lines

• External interrupt inputs shared with 4 I/O lines

• 8-bit programmable Timer/Event Counter with overflow interrupt and 7-stage prescaler

• 16-bit programmable Timer/Event Counter with overflow interrupt and 7-stage prescaler

• 4096x15 Flash Program Memory

• 192x8 Data Memory RAM

• On-chip crystal, internal RC and external RC oscillator

• Fully integrated internal RC oscillator with three fixed frequencies: 12MHz, 16MHz or 20MHz

• Watchdog Timer function

• PFD for audio frequency generation

• Power down and wake-up functions to reduce power consumption

• Up to 0.2μs instruction cycle with 20MHz system clock at VDD=5V

• 8-level subroutine nesting

• 8 channel 12-bit resolution A/D converter

• 3 pairs of 10-bit PWM with complementary outputs shared with six I/O lines and with 3 PWM duty control registers

• Bit manipulation instruction

• Table read instructions

• 63 powerful instructions

• All instructions in one or two machine cycles

• Low voltage reset function

• Low voltage detect function

• Integrated operational Amplifier

• Integrated Analog Comparator with interrupt function

• Flash program memory can be re-programmed yp to 100,000 times

• Flash program memory data retention > 10 years

• ICP (In-Circuit Programming) interface

• 28-pin SOP package