HD404459 Series
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 (ZTATTM version).
The HD4074459 is a PROM version (ZTATTM microcomputer).
A program can be written to the PROM by a PROM writer, thus dramatically shortening system development periods and turnaround time (ZTAT TM versions are 27256-comp...