HT95R35 -- Phone 8-Bit MCU with DTMF Receiver

General Description

The HT95R35 MCU is an 8-bit high performance, RISC architecture microcontroller device specially designed for telephone applications. Device flexibility is enhanced with their internal special features such as power-down and wake-up functions, DTMF generator, DTMF receiver, 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 deluxe feature phone, cordless phones, fax and answering machines, etc.

The device is best 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= 14.32MHz: 4.5V~5.5V
  • 16Kx16 OTP type Program Memory
  • 2112x8 Data Memory
  • 42 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 to 14.32MHz frequency-up PLL circuit
  • Real time clock function
  • Watchdog timer function
  • PFD driver output
  • Dual Serial Interfaces: SPI and I2C
  • DTMF generator
  • DTMF receiver
  • 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
  • 64-pin LQFP package

Technical Document

 

Other Information