HT82K74E/HT82K74EE -- 27MHz Keyboard/ Mouse TX 8-Bit MCU (EOL)

General Description

The device is an 8-bit high performance, RISC architecture microcontroller devices specifically designed for multiple I/O control product applications.

The advantages of low power consumption, I/O flexibility, timer functions, Power Down and wake-up functions, Watchdog timer, motor driving, industrial control, consumer products, subsystem controllers, etc.

There are two dice in the HT82K74EE package: one is the HT82K74E MCU, the other is a 128x8 bits EEPROM used for data memory purpose. The two dice are wire-bonded to form HT82K74EE.

Features

  • Operating voltage:
    fSYS= 27MHz: 3.0V~3.3V for crystal mode
  • Program Memory: 2Kx15 bits
  • Data Memory: 96x8 bits
  • 36 bidirectional I/O lines, with pull-high options
  • Watchdog Timer function
  • Single 16-bit internal timer with overflow interrupt and timer input
  • Power down and wake-up functions to reduce
    power consumption
  • 4-level subroutine nesting
  • Bit manipulation instruction
  • Table read instructions
  • Built-in DC/DC to provide stable (2.8V, 3.0V, 3.3V use configuration option) DC_DC 3.0V with error ±0.1V
  • 2.2V/2.0V with ± 0.1V tolerance or 1.8V Low battery detector with internal bit set, it detects the BAT-in input voltage
  • 128x8 bits data EEPROM for HT82K74EE
  • One external crystal (27MHz) to supply microcontroller system clock
  • 63 powerful instructions
  • All instructions executed in one or two machine cycles
  • Low voltage reset function
  • Crystal oscillator which built-in capacitor value can configure by firmwave OSCC register
  • Two bit to define microcontroller system clock (fSYS/1, fSYS/4, fSYS/8, fSYS/16)
  • HT82K74E: 28-pin SSOP, 32-pin QFN and 48-pin SSOP/LQFP packages
    HT82K74EE: 28-pin SSOP and 48-pin SSOP/LQFP packages

Technical Document

Other Information