HT66F004 Datasheet | Holtek Semiconductor

Features CPU Features - Operating Voltage - f SYS = 8MHz: 2.2V~5.5V - Up to 0.5μs instruction cycle with 8MHz system clock at VDD=5V - Power down and wake-up functions to reduce power consumption - Two Oscillators - Internal High Speed 8MHz RC -- HIRC - Internal Low Speed 32k Hz RC -- LIRC - Fully intergrated internal oscillator requires no external ponents - Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP - All instructions executed in one or two instruction cycles - Table read instructions - 61 powerful instructions - Up to 4-level subroutine nesting - Bit manipulation instruction Peripheral Features - Flash Program Memory: 1K×14/2K×15 - RAM Data Memory: 64×8/96×8 - True EEPROM Memory: 32×8 - Watchdog Timer function - Up to 18 bidirectional I/O lines - Software controlled 4-S lines LCD driver with 1/2 bias (only available for HT66F004) - Multiple pin-shared external interrupts - Multiple Timer Modules for time measure, pare match output, capture input, PWM output, single pulse output functions - Dual Time Base functions for generation of fixed time interrupt signals - Multi-channel 12-bit resolution A/D converter - Low voltage reset function - Wide range of available package types - Flash program memory can be re-programmed up to 10,000 times - Flash program memory data retention > 10 years - True EEPROM data memory can be re-programmed up to 100,000 times - True EEPROM data memory data retention > 10 years Rev. 2.50 December 17, 2025 HT66F002/HT66F0025/HT66F003/HT66F004 Cost-Effective A/D Flash MCU with EEPROM General Description The devices are Flash Memory type 8-bit high performance RISC architecture microcontrollers. Offering users the convenience of Flash Memory multi-programming features , these devices also include a wide range of functions and...