7/33

M41T62/63/64/65

Figure 14. M41T65 Block Diagram

Note: 1. Open Drain.

Figure 15. Hardware Hookup for Battery Back-up Operation

Note: 1. Diode required on open drain pin (M41T65 only) for battery (or SuperCap) back-up. Low threshold BAT42 diode recommended.

2. For M41T62 and M41T65 (Open Drain).

3. For M41T63 and M41T65 (Open Drain).

4. For M41T64 (Open Drain).

REAL TIME CLOCK

CALENDAR

RTC W/ALARM

OSCILLATOR FAIL

DETECT

WATCHDOG

IRQ/FT/OUT

(1)

WDO

(1)

OFIE

SDA

SCL

FT

AFE

I2C

INTERFACE

32KHz

OSCILLATOR

XTAL

AI09193

AI10400

VCC

Port

Reset Input

SQWIN

Serial Clock Line

Serial Data Line

32KHz CLKIN

XO

XI

M41T6x

MCU

VSS

IRQ/FT/OUT

(2)

WDO

(3)

SQW

(4)

F32K

SDA

SCL

VCC

VCC

(1)