HT66F50

Enhanced A/D Flash Type MCU 8-Bit MCU

A/D Flash MCU with EEPROM

CPU Features
• Operating Voltage:
♦ fSYS=8MHz: 2.2V~5.5V
♦ fSYS=12MHz: 2.7V~5.5V
♦ fSYS=20MHz: 4.5V~5.5V
• Up to 0.2μs instruction cycle with 20MHz system clock at VDD=5V
• Power down and wake-up functions to reduce power consumption
• Five oscillators:
♦ External Crystal — HXT
♦ External 32.768kHz Crystal — LXT
♦ External RC — ERC
♦ Internal RC — HIRC
♦ Internal 32kHz RC — LIRC
• Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP
• Fully integrated internal 4MHz, 8MHz and 12MHz oscillator requires no external components
• All instructions executed in one or two instruction cycles
• Table read instructions
• 63 powerful instructions
• Up to 12-level subroutine nesting
• Bit manipulation instruction

Peripheral Features
• Flash Program Memory: 1K×14~12K×16
• RAM Data Memory: 64×8~576×8
• True EEPROM Memory: 32×8~256×8
• Watchdog Timer function
• Up to 50 bidirectional I/O lines
• Software controlled 4-SCOM lines LCD driver with 1/2 bias
• Multiple pin-shared external interrupts
• Multiple Timer Module for time measure, input capture, compare match output, PWM output or single pulse output function
• Serial Interfaces Module — SIM for SPI or I2 C
• Dual Comparator functions
• Dual Time-Base functions for generation of fixed time interrupt signals
• Multi-channel 12-bit resolution A/D converter
• Low voltage reset function
• Low voltage detect function
• Optional peripheral — UART module for fully duplex asynchronous communication
• Wide range of available package types
• Flash program memory can be re-programmed up to 100,000 times
• Flash program memory data retention > 10 years
• True EEPROM data memory can be re-programmed up to 1,000,000 times
• True EEPROM data memory data retention > 10 years