HD404394 データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HD404394

4-bit microcomputers

Hitachi -> Renesas Electronics 

HD404344R Series/HD404394 Series

Rev. 7.0

Sept. 1999

Description

The HD404344R series and HD404394 series 4-bit microcomputers are products of the HMCS400 series,

which is designed to make application systems compact while realizing higher performance and increasing

program productivity.

Each microcomputer has an A/D converter, two timers and a serial interface. The HD404344R series

includes the HD404344R with on-chip 4-kword ROM, HD404342R with 2-kword ROM, and HD404341R

with 1-kword ROM. The HD404394 series includes the HD404394 with on-chip 4-kword ROM,

HD404392 with 2-kword ROM, and HD404391 with 1-kword ROM.

The HD4074344 and HD4074394 are the PROM version ZTAT™ microcomputers. Programs can be

written to the PROM by a PROM writer, which can dramatically shorten system development periods and

smooth the process from debugging to mass production. (The PROM program specifications are the same

as for the 27256.)

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

Features

• Input/output pins

 HD404344R series, HD4074344: 22 pins

(10pins: Large-current I/O pins)

 HD404394 series: 21 pins

(3 pins: intermediate-voltage NMOS open drain I/O; 5 pins: NMOS open drain I/O with 15-mA

high-current driver)

• Two timer/counters

 One timer output

 One event counter input (with programmable edge detection)

• 8-bit clock-synchronous serial interface (1 channel)

• On-chip A/D converter

 HD404344R series, HD4074344: 8 bit × 4 channel

 HD404394 series: 8 bit × 3 channel (with Vref pin)

• Built-in oscillator

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