HT66F0187 LQFP44

The HT66F0187 is a Flash Memory type 8-bit high performance RISC architecture microcontroller. Offering users the convenience of Flash Memory multi-programming features, the HT66F0187 also includes a wide range of functions and features. Other memory includes an area of RAM Data Memory as well as an area of true EEPROM memory for storage of non-volatile data such as serial numbers, calibration data etc.

CPU Features

Operating voltage
fSYS= 8MHz: 2.2V~5.5V
fSYS=12MHz: 2.7V~5.5V
fSYS=20MHz: 4.5V~5.5V
Up to 0.2us instruction cycle with 20MHz system clock at VDD=5V
Power down and wake-up functions to reduce power consumption
Oscillator type
– External Crystal – HXT
– External 32.768kHz Crystal – LXT
– Internal High Speed RC – HIRC
– Internal 32kHz RC – LIRC
Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP
Fully integrated internal 8/12/16MHz oscillator requires no external components
All instructions executed in one to three instruction cycles
Table read instructions
115 powerful instructions
8-level subroutine nesting
Bit manipulation instruction

Peripheral Features

Flash Program Memory: 4Kx16
RAM Data Memory: 256×8
True EEPROM Memory: 64×8
Watchdog Timer function
46 bidirectional I/O lines
Software controlled 4-SCOM lines LCD driver with 1/2 bias
Programmable I/O port source current for LED applications
Two pin-shared external interrupts
Multiple Timer Module for time measure, input capture, compare match output, PWM output or single pulse output functions
Serial Interface Module with SPI and I2C interfaces
Full-duplex Universal Asynchronous Receiver and Transmitter Interface — UART
One comparator function
Dual Time-Base functions for generation of fixed time interrupt signals
8-channel 12-bit resolution A/D converter
Low Voltage Reset function
Low Voltage Detect function
Package type: 44/48-pin LQFP