M41T62(2004) 查看數據表（PDF） - STMicroelectronics

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M41T62
(Rev.:2004)

Serial Access Real-Time Clock with Alarms

STMicroelectronics 

M41T62/63/64/65

SUMMARY DESCRIPTION

The M41T6X Serial Access TIMEKEEPER® is a

low power Serial RTC with a built-in 32.768 KHz

oscillator (external crystal controlled). Eight regis-

ters (see Table 3., page 13) are used for the clock/

calendar function and are configured in binary

coded decimal (BCD) format. An additional 8 reg-

isters provide status/control of Alarm, 32KHz out-

put, Calibration, and Watchdog functions.

Addresses and data are transferred serially via a

two line, bi-directional I2C interface. The built-in

address register is incremented automatically af-

ter each WRITE or READ data byte.

Functions available to the user include a time-of-

day clock/calendar, Alarm interrupts (M41T62/65),

32KHz output (M41T64), programmable Square

Wave output (M41T62/63/64), and Watchdog out-

put (M41T63/65). The eight clock address loca-

tions contain the century, year, month, date, day,

hour, minute, second and tenths/hundredths of a

second in 24 hour BCD format. Corrections for 28-

, 29- (leap year), 30- and 31-day months are made

automatically.

The M41T6X is supplied in a 16-pin QFN.

Figure 2. M41T62 Logic Diagram

VCC

Figure 4. M41T63 Logic Diagram

VCC

XI

XO

SCL

SDA

M41T62

IRQ/OUT(1)

SQW(2)

XI

XO

SCL

SDA

M41T63

WDO(1)

SQW(2)

VSS

Note: 1. Open Drain.

2. Defaults to 32KHz on power-up.

AI09103

Figure 3. M41T64 Logic Diagram

VCC

XI

XO

SCL

SDA

M41T64

SQW(1)

F32k(2)

VSS

Note: 1. Open Drain.

2. Defaults to 32KHz on power-up.

AI09189

Figure 5. M41T65 Logic Diagram

VCC

XI

XO

SCL

SDA

M41T65

WDO(1)

IRQ/FT/OUT(1)

VSS

Note: 1. Open Drain.

2. Defaults to 32KHz on power-up.

AI09108

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VSS

Note: 1. Open Drain.

AI09109

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