Description

The M41T00 is a low power serial real time clock with a built-in 32.768 kHz oscillator (external crystal controlled). Eight bytes of the RAM are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. Addresses and data are transferred serially via a

two-line bidirectional bus. The built-in address register is incremented automatically after each

WRITE or READ data byte.

Features

■ For new designs use M41T00S

■ Counters for seconds, minutes, hours, day, month, years, and century

■ 32 kHz crystal oscillator integrating load capacitance (12.5 pF) providing exceptional oscillator stability and high crystal series resistance operation

■ Serial interface supports I2C bus (100 kHz protocol)

■ Ultra low battery supply current of 0.8 μA (typ at 3 V)

■ 2.0 to 5.5 V clock operating voltage

■ Automatic switchover and deselect circuitry

(for 3 V application select M41T00S datasheet)

■ Software clock calibration to compensate crystal deviation due to temperature

■ Automatic leap year compensation

■ Operating temperature of -40 to 85 °C

M41T00M屬于集成電路（IC） > 實時時鐘。意法半導(dǎo)體（ST）集團(tuán)制造生產(chǎn)的M41T00M實時時鐘實時時鐘 (RTC) 為幾乎所有需要保持精確時間的電子設(shè)備提供時間和/或日期信息。時鐘類型有二進(jìn)制計數(shù)器、時鐘/日歷/監(jiān)控器、歷時計時器、幻時鐘芯片、便攜式系統(tǒng)控制器、溫度記錄器、時間事件記錄器和計時器時鐘外設(shè)。其包含 2 B 至 2 MB 不等的存儲器，接口選項有 I2C、并行、串行、SPI、1 線式、2 線式、3 線式和 4 線式。