HT45R22E -- Remote Type 8-bit OTP MCU with EEPROM

General Description

The device is an 8-bit high performance, RISC architecture microcontrollers specifically designed for operational amplifier applications. The usual Holtek microcontroller features of low power consumption, I/O flexibility, timer functions, oscillator options, internal comparator, internal operational amplifiers, power down and wake-up functions, watchdog timer and low voltage reset, combine to provide the device with a wide range of functional options while still maintaining a high level of cost effectiveness. The fully integrated system oscillator HIRC, which requires no external components and which has three frequency selections, opens up a huge range of new application possibilities for this device, some of which may include remote control appliances, car reversing systems, level meters, consumer products,
household appliances subsystem controllers, etc.

CPU Features

  • Operating voltage: fSYS= 4MHz: 2.2V~3.6V
  • Program Memory: 4Kx15
  • Data Memory: 128x8
  • Embedded 1024x8 EEPROM
  • Up to 1us instruction cycle with 4MHz system clock at VDD= 3V
  • Idle/Sleep mode and wake-up functions to reduce power consumption
  • Oscillator types:
    External high freuency Crystal -- HXT
    External RC -- ERC
    Internal high frequency RC -- HIRC
    External low frequency crystal -- LXT
    Internal low frequency RC -- LIRC
  • Four operational modes: Normal, Slow, Idle, Sleep
  • Fully integrated internal 4095kHz oscillator requires no external components
  • Watchdog Timer function
  • LIRC oscillator function for watchdog timer
  • All instructions executed in one or two instruction cycles
  • Table read instructions
  • 63 powerful instructions
  • 4-level subroutine nesting
  • Bit manipulation instruction
  • Low voltage reset function
  • 20/24-pin SOP package types

Peripheral Features

  • Up to 22 bidirectional I/O lines
  • Software controlled 4-SCOM lines LCD COM driver
    with 1/2 bias
  • External interrupt input shared with an I/O line
  • Two 8-bit programmable Timer/Event Counter with
    overflow interrupt and prescaler
  • Time-Base function
  • Programmable Frequency Divider - PFD shared
    with I/O line
  • Two integrated operational amplifiers with interrupt function - one with programmable gain control
  • Single comparator with interrupt and low power consumption

Technical Document

Other Information