404344RF

www.DataSheet4U.com 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 seri...