HMCS40

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