HD404339 Series
Rev. 7.0
Sept. 1999
Description
The HD404339 Series is 4-bit HMCS400-Series microcomputer with large-capacity memory designed to
increase program productivity. Each microcomputer has an A/D converter, input capture timer, and a 32-
kHz oscillator circuit for clock use all built in. They also come with high-voltage I/O pins that can directly
drive a fluorescent display.
The HD404339 Series includes six chips: the HD404339 with 16-kword ROM; the HD4043312 with 12-
kword ROM; the HD404338 with 8-kword ROM; the HD404336 with 6-kword ROM; the HD404334 with
4-kword ROM; the HD4074339 with 16-kword PROM.
The HD4074339 is a PROM version ZTAT鈩?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鈩? Zero Turn Around Time ZTAT is a trademark of Hitachi Ltd.
Features
鈥?/div>
54 I/O pins
錚?/div>
One input-only pin
錚?/div>
53 input/output pins: 30 pins are high-voltage pins (40 V, max.)
鈥?/div>
On-chip A/D converter (8-bit
脳
12-channel)
鈥?/div>
Three timers
錚?/div>
One event counter input
錚?/div>
One timer output
錚?/div>
One input capture timer
鈥?/div>
8-bit clock-synchronous serial interface (1 channel)
鈥?/div>
Alarm output
鈥?/div>
Built-in oscillators
錚?/div>
Ceramic or crystal oscillator
錚?/div>
External clock drive is also possible
錚?/div>
Subclock: 32.768-kHz crystal oscillator
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