Description

The HD404019R series are HMCS400-series CMOS 4-bit single-chip microcomputers. Each device incorporates a ROM, RAM, I/O, serial interface, and two timer/counters, and contains high-voltage I/O pins including high-current output pins to directly drive fluorescent displays.

Features

• 16,384-word × 10-bit ROM

- Mask ROM: HD404019R, HD40L4019R

- PROM: HD4074019, HD407L4019

• 992-digit × 4-bit RAM

• 58 I/O pins, including 26 high-voltage I/O pins (40 V max.)

• Two timer/counters

- 8-bit free-running timer

- 8-bit auto-reload timer/counter

• Clock synchronous 8-bit serial interface

• Five interrupt sources

- Two by external sources

- Two by timer/counters

- One by serial interface

• Subroutine stack, up to 16 levels including interrupts

• Minimum instruction execution time: 0.89 µs

• Low-power dissipation modes

- Standby: Stops instruction execution while allowing clock oscillation and interrupt functions to operate

- Stop: Stops instruction execution and clock oscillation while retaining RAM data

• On-chip oscillator

- Crystal or ceramic oscillator

- External clock

• Packages

- 64-pin shrink type plastic DIP

- 64-pin flat plastic package

- 64-pin shrink type ceramic DIP with window