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The HMCS404C/CL/AC are CMOS 4-bit single-chip microcomputers which are members of the HMCS400 series. The HMCS404C/CL/AC have efficient and powerful architecture and its software is very similar to the HMCS40 series. These microcomputers provide variety of on-chip resources such as ROM, RAM, I/O, two timer/counters and a serial interface to perfom in wide users applications. I/O pins of HMCS404C/CL/AC are able to drive fluorescent display tube directly.

The HMCS404CL is able to operate in low voltage and has the characteristics of wirde-range operation voltage. The HMCS404 AC is a high-speed version of HMCS404C.

  • Hardware Features:
    • 4-bit Architecture
    • 2.048 Words x 10-bit ROM (HMCS412)
    • 4.096 Words x 10-bit ROM (HMCS414/424)
    • 160-digit x 4-bit RAM (HMCS412/414)
    • 256 Digits x 4-bit RAM (HMCS424)
    • 58 I/O Pins, Including 26 High Voltage I/O Pins (40V Max)
    • Two Timer/Counters
      • 11-bit Prescaler
      • 8-bit Free Running Timer
      • 8-bit Auto-Reload Timer/Event Counter
    • Clock Synchronous 8-bit Serial Interface
    • Five Interrupts
      • External 2
      • Timer/Counter 2
      • Serial Interface 1
    • Subroutine Stack
      • Up to 16 Levels Including Interrupt
    • Two Low Power Dissipation Modes
      • Standby - Stops instruction execution while keeping clock oscillation and interrupt function in operation
      • Stop - Stops instruction execution and clock oscillation while retaining RAM data
    • On-Chip Oscillator