Datasheet > HCD404669

HCD404669

更新时间： 2024-09-30 03:41:19

品牌	Logo	应用领域
日立 - HITACHI		计算机
页数	文件大小	规格书
142页	456K
描述
Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

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HCD404669 数据手册

HD404669 Series

Low-Voltage AS Microcomputers with On-Chip DTMF

Generation Circuit

ADE-202-083B

Rev. 3.0

Sept. 1999

Description

The HD404669 Series microcomputers incorporate a DTMF generation circuit, two comparators, 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 microcomputers that are optimal for use in multifunction telephones,

cordless telephones, and other communications equipment.

HD404669 Series microcomputers have a 32.768 kHz 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™ microcomputer 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 mA max.): 4

High-current I/O pins (sink: 15 mA max.):

Timer counters: 3

•

Input capture: one 8-bit channel

Timer outputs: 2 (with PWM output capability)

Event input: 1 (edge-programmable)

Clock synchronous 8-bit serial interface: 1

DTMF generation circuit

Comparator: 2 channels

System clock oscillator

Ceramic oscillator, crystal oscillator, or external clock operation possible

12 3 4 5 6 7...142

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