HD404318 Datasheet, PDF (1/66 Pages) Hitachi Semiconductor – 4-bit HMCS400-series microcomputer

HD404318 Series
Rev. 6.0
Sept. 1998
Description
The HD404318 Series is 4-bit HMCS400-series microcomputer with large-capacity memory designed to
increase program productivity. Each microcomputer has an A/D converter and input capture timer built in.
They also come with high-voltage I/O pins that can directly drive a fluorescent display.
The HD404318 Series includes four chips: the HD404318 with 8-kword ROM; the HD404316 with 6-
kword ROM; the HD404314 with 4-kword ROM; the HD4074318 with 8-kword PROM.
The HD4074318 is a PROM version ZTAT™ microcomputer. 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
• 34 I/O pins
 One input-only pin
 33 input/output pins: 21 pins are high-voltage pins (40 V, max.)
• On-chip A/D converter (8-bit × 8-channel)
• Three timers
 One event counter input
 One timer output
 One input capture timer
• 8-bit clock-synchronous serial interface (1 channel)
• Alarm output
• Built-in oscillators
 Ceramic or crystal oscillator
 External clock drive is also possible