M41T81SM6 查看數據表（PDF） - STMicroelectronics

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M41T81SM6

Serial Access Real-Time Clock with Alarms

STMicroelectronics 

Summary description

Figure 4. Block diagram

M41T81S

CRYSTAL

32KHz

OSCILLATOR

SDA

SCL

I2C

INTERFACE

WRITE

PROTECT

VCC

VBAT

VSO

VPFD

COMPARE

REAL TIME CLOCK

CALENDAR

OSCILLATOR FAIL OFIE

CIRCUIT

RTC W/ALARM AFE

& CALIBRATION

WATCHDOG

SQWE(2)

SQUARE WAVE

FREQUENCY TEST FT

OUTPUT DRIVER OUT

INTERNAL

POWER

IRQ/FT/OUT/SQW(1)

AI09163

1. Open drain output

2. Square Wave function has the highest priority on IRQ/FT/OUT/SQW output.

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