HCD404669
Description
The HD404669 Series microputers incorporate a DTMF generation circuit, two parators, and a serial interface on chip. They also provide input and output pins with large current handling capacities. Thus they are 4-bit single-chip microputers that are optimal for use in multifunction telephones, cordless telephones, and other munications equipment. HD404669 Series microputers have a 32.768 k Hz sub-oscillator for realtime clock use, providing a time counting facility, and a variety of power supply modes to reduce current drain. The HD407A4669 is a ZTAT™ microputer with on-chip PROM that drastically shortens development time and ensures a smooth transition from debugging to mass production. (The PROM programming specifications are the same as for the 27256 type.) ZTAT™: Zero Turn-Around Time ZTAT is a trademark of Hitachi, Ltd.
Features
- 1,152-digit × 4-bit RAM
- I/O pins: 47 High-current I/O pins (source: 10 m A max.): 4 High-current I/O pins (sink: 15 m A max.): 5
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