描述 Description

The DS2404 1-Wire? EconoRAM time chip offers a simple solution for storing and retrieving vital data and time information with minimal hardware. The DS2404 contains a unique lasered ROM, real-time clock/calendar, interval timer, cycle counter, programmable interrupts, and 4096-bits of SRAM. Two separate ports are provided for communication: 1-Wire and 3-wire. Using the 1-Wire port, only one pin is required for communication, and the lasered-ROM can be read even when the DS2404 is without power. The 3-wire port provides high-speed communication using the traditional Dallas Semiconductor 3-wire interface. With either interface, a strict protocol for accessing the DS2404 ensures data integrity. Utilizing backup energy sources, the data is nonvolatile (NV) and allows for stand-alone operation. The DS2404 features can be used to create a stopwatch, alarm clock, time and date stamp, logbook, hour meter, calendar, system power-cycle timer, expiration timer, and event scheduler.

特性 Features

? 4096 bits of nonvolatile dual-port memory including real-time clock/calendar in binary format, programmable interval timer, and programmable power-on cycle counter
? 1-Wire interface for communication at 16.3kbps
? 3-wire host interface for high-speed data communications at 2Mb/s
? Unique, factory-lasered and tested 64-bit registration number assures absolute traceability because no two parts are alike
? Programmable alarms can be set to generate interrupts for interval timer, real-time clock, and/or cycle counter
? 16-pin DIP, SO, and SSOP packages
? Operating temperature range from -40°C to +85°C
? Operating voltage range from 2.8V to 5.5V

簡(jiǎn)介

DS2404屬于集成電路（IC）的實(shí)時(shí)時(shí)鐘。由制造生產(chǎn)的DS2404實(shí)時(shí)時(shí)鐘實(shí)時(shí)時(shí)鐘 (RTC) 為幾乎所有需要保持精確時(shí)間的電子設(shè)備提供時(shí)間和/或日期信息。時(shí)鐘類(lèi)型有二進(jìn)制計(jì)數(shù)器、時(shí)鐘/日歷/監(jiān)控器、歷時(shí)計(jì)時(shí)器、幻時(shí)鐘芯片、便攜式系統(tǒng)控制器、溫度記錄器、時(shí)間事件記錄器和計(jì)時(shí)器時(shí)鐘外設(shè)。其包含 2 B 至 2 MB 不等的存儲(chǔ)器，接口選項(xiàng)有 I2C、并行、串行、SPI、1 線(xiàn)式、2 線(xiàn)式、3 線(xiàn)式和 4 線(xiàn)式。