M41T82 datasheet(24/61 Pages) STMICROELECTRONICS

tên linh kiện	M41T82

Giải thích chi tiết về linh kiện	Serial I2C bus RTC with battery switchover

PDF	61 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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24 / 61 page

Clock operation

M41T82-M41T83

24/61

Doc ID 12578 Rev 12

Table 5.

Key to Table 4: M41T83 clock/control register map (32 bytes)

Code

Explanation

Must be set to zero

ABE

Alarm in battery back-up enable bit

A1IE, A2IE

Alarm interrupt enable bits

AC0-AC6

Analog calibration bits

ACS

Analog calibration sign bit

AF1, AF2

Alarm flag

AL2E

Alarm 2 enable bit

Battery low bit

BMB0-BMB4

Watchdog multiplier bits

CB0, CB1

Century bits

DC0-DC4

Digital calibration bits

DCS

Digital calibration Sign bit

Frequency test bit

Halt update bit

Oscillator fail bit

OUT

Output level

OFIE

Oscillator fail interrupt enable

OTP

OTP control bit

RB0-RB2

Watchdog resolution bits

RPT11-RPT15

Alarm 1 repeat mode bits

RPT21-RPT25

Alarm 2 repeat mode bits

RS0-RS3

SQW frequency

SQWE

Square wave enable

SRAM/ALM2

SRAM/alarm 2 bit

Stop bit

TD0, TD1

Timer frequency bits

Timer enable bit

Timer flag

TI/TP

Timer interrupt or pulse

TIE

Timer interrupt enable

WDF

Watchdog flag

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