HT46R74D-1 -- Dual Slope A/D Type MCU with LCD

General Description

The HT46R74D-1 is an 8-bit high performance, RISC architecture microcontroller device specifically designed for A/D with LCD applications that interface directly to analog signals, such as those from sensors. The advantages of low power consumption, I/O flexibility, timer functions, oscillator options, Dual slope A/D converter, LCD display, HALT and wake-up functions, watchdog timer, as well as low cost, enhance the versatility of these devices to suit for a wide range of AD with LCD application possibilities such as sensor signal processing, scales, consumer products, subsystem controllers, etc.

Features

  • Operating voltage:
    fSYS = 4MHz: 2.2V~5.5V
    fSYS = 8MHz: 3.3V~5.5V
  • 10 bidirectional I/O lines and two ADC inputs
  • Two external interrupts inputs shared with I/O lines
  • One 8-bit and one 18-bit programmable timer/event
    counter with overflow interrupt and pre-scaler
  • LCD driver with 15x4, 16x3 or 16x2 segments
  • 4Kx15 program memory with partial lock function
  • 96x8 data memory RAM
  • Single differential input channel dual slope Analog to Digital Converter with Operational Amplifier.
  • Watchdog Timer with regulator power
  • Buzzer output
  • External 32768Hz RTC oscillator
  • Integrated RC or crystal oscillator
  • Power-down and wake-up functions reduce power
    consumption
  • Internal 3.3V Voltage regulator and charge pump
  • Embedded voltage reference generator - 1.5V
  • 6-level subroutine nesting
  • Bit manipulation instruction
  • 15-bit table read instruction
  • Up to 0.5us instruction cycle with 8MHz system clock at VDD=5V
  • 63 powerful instructions
  • All instructions in 1 or 2 machine cycles
  • Low voltage reset/detector function
  • 56-pin SSOP package

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