HD404458 datasheet(3/122 Pages) RENESAS

3 / 122 page

HD404459 Series

Rev. 6.0

Sept. 1998

Description

The HD404459 Series is a member of the 4-bit HMCS400-series microcomputers with large-capacity

memory and architecture providing high program productivity. Each microcomputer has a 32-kHz

oscillator for clock, low-voltage (1.8 V) operating mode, and four low-power dissipation modes.

The HD404459 Series includes three chips: the HD404458 with an 8-kword ROM; the HD404459 with a

16-kword ROM; and the HD4074459 with a 16-kword PROM (ZTAT

TM version).

The HD4074459 is a PROM version (ZTAT

TM microcomputer). A program can be written to the PROM by

a PROM writer, thus dramatically shortening system development periods and turnaround time (ZTAT

versions are 27256-compatible).

ZTAT

TM: Zero Turn Around Time ZTAT is a trademark of Hitachi, Ltd.

Features

• 8,192-word × 10-bit ROM (HD404458)

16,384-word

× 10-bit ROM (HD404459 and HD4074459)

• 512-digit × 4-bit RAM (HD404458)

768-digit

× 4-bit RAM (HD404459 and HD4074459)

• 56 I/O pins, including seven input pins

• Four timer/counters

• 1-channel × 8-bit input capture circuit

• Three timer outputs (including two PWM outputs)

• Two event counter inputs (including one double-edge function)

• 8-bit clock-synchronous serial interface

• Eight wakeup inputs

• Four-channel voltage comparator (external or internal reference power supply can be selected)

• Built-in oscillators

 Main clock: 4-MHz ceramic or crystal oscillator (an external clock is also possible)

 Subclock: 32.768-kHz crystal

HD404458 Datasheet(PDF) 3 Page - Renesas Technology Corp