HD404459 Datasheet, PDF (3/122 Pages) Renesas Technology Corp – 4-bit HMCS400-series microcomputers

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^TM
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