HT95R54/HT95R55 -- CID Phone 8-Bit MCU

General Description

The series of CID phone MCU are 8-bit high performance, RISC architecture microcontroller devices specially designed for telephone applications. Devices flexibility are enhanced with their internal special features such as power-down and wake-up functions, DTMF generator, DTMF receiver, FSK decoder, PFD driver, SPI and I2C interface, audio DAC output, etc.
These features combine to ensure applications require a minimum of external components and therefore reduce overall product costs.

Having the advantages of low-power consumption, high-performance, I/O flexibility as well as low-cost, these devices have the versatility to suit a wide range of application possibilities such as FSK & DTMF mode Caller ID phone, Home Security products, deluxe feature phones, cordless phones, fax and answering machines, etc.

The device will be ideally suited for phone products that comply with versatile dialer specification requirements for different areas or countries. The device is fully supported by the Holtek range of fully functional development and programming tools, providing a means for fast and efficient product development cycles.

Features

  • Operating voltage:
    fSYS=3.58MHz: 2.2V~5.5V
    fSYS=7.16MHz: 3.0V~5.5V
    fSYS=10.74MHz: 3.0V~5.5V
    fSYS=14.32MHz: 4.5V~5.5V
  • Program Memory:
    8Kx16 (HT95R54)
    16Kx16 (HT95R55)
  • 2112x8 Data Memory
  • 38 bidirectional I/Os with pull-high options
  • 2 NMOS output-only lines
  • External interrupt input
  • Three 16-bit timers with interrupts
  • Timer external input
  • 8-level stack
  • 32768Hz system oscillator
  • 32768Hz up to 14.32MHz frequency-up circuit
  • Real time clock function
  • Watchdog timer function
  • PFD driver output
  • Serial Interfaces Module: SIM for SPI or I2C
  • Internal DTMF generator
  • Internal DTMF receiver
  • Internal FSK decoder
    Support Bell 202 and V.23
    Support ring and line reverse detection
  • 12-bit Audio DAC output
  • Power-down and wake-up feature for power-saving
    operation: Idle mode, Sleep mode, Green mode and Normal mode
  • Up to 0.28us instruction cycle with 14.32MHz system clock at VDD=4.5V~5.5V
  • Bit manipulation instructions
  • Table read function
  • 63 powerful instructions
  • All instructions executed in 1 or 2 machine cycles
  • Low voltage reset function
  • Supported by comprehensive suite of hardware and software tools
  • Internal low battery detector
  • Software Controlled R-Type LCD Driver (SCOM)
  • 64-pin LQFP package

Technical Document

 

Other Information