HT66L2540A Datasheet | Holtek Semiconductor

Features CPU Features - Operating voltage - MIRC ̶ f SYS=64k Hz: 1.8V~5.5V ̶ f SYS=128k Hz: 1.8V~5.5V ̶ f SYS=256k Hz: 1.8V~5.5V ̶ f SYS=512k Hz: 1.8V~5.5V - HXT ̶ f SYS=1MHz: 2.2V~5.5V ̶ f SYS=2MHz: 2.2V~5.5V ̶ f SYS=4MHz: 2.2V~5.5V ̶ f SYS=8MHz: 2.2V~5.5V ̶ f SYS=12MHz: 2.7V~5.5V ̶ f SYS=16MHz: 3.6V~5.5V - HIRC ̶ f SYS=2MHz: 1.8V~5.5V ̶ f SYS=4MHz: 1.8V~5.5V ̶ f SYS=8MHz: 2.2V~5.5V - Up to 0.25μs instruction cycle with 16MHz system clock at VDD=5V - Power down and wake-up functions to reduce power consumption - Low current consumption - Under 0.5μA @ 3V current of SLEEP mode, Time Base on and LIRC on - Operating current consumption: 350μA @ f SYS=4MHz/3V, HXT on - Operating current consumption: 3.8μA @ f SYS=32.768k Hz/3V - Oscillator types - External High Speed Crystal - HXT - Internal High Speed 2/4/8MHz RC - HIRC - Internal Medium Speed 64/128/256/512k Hz RC - MIRC - External Low Speed 32.768k Hz Crystal - LXT - Internal Low Speed 32.768k Hz RC - LIRC - Multi-mode operation: FAST, SLOW, IDLE and SLEEP - Fully integrated internal oscillators require no external ponents - All instructions executed in 1~3 instruction cycles - Table read instructions - 115 powerful instructions - 8-level subroutine nesting - Bit manipulation instruction Rev. 1.40 September 05, 2025 HT66L2530A/HT66L2540A/HT66L2550A Low Power A/D Flash MCU Peripheral Features - Flash Program Memory: 2K×16~8K×16 - Data Memory: 128×8~512×8 - True EEPROM Memory: 128×8~256×8 - In Application Programming function -...