BU9873 Datasheet (ROHM) - I2C BUS Serial Interface RTC

BU9873, I2C BUS Serial Interface RTC

Pin No.

1 2 3 4 5 6 7 8 Symbol 32KOUT SCL SDA VSS INTRB OSCOUT OSCIN VDD Input/Output Output Function The 32KOUT pin is used to output 32.768 kHz clock pulses, which is controlled by an internal register.

This pin is enabled during power-on from 0V, and is CMOS push-pull output.

The SCL pin is used

Datasheet Real-Time Clock (RTC) series I2C BUS Serial Interface RTC with High-precision Oscillation Adjustment BU9873 Outline The BU9873 is a CMOS real-time clock, which has a built-in interrupt generation function.

This product is 2 connected to the CPU via I C interface, and configured to perform serial transmission of time and calendar data to the CPU.

A high-precision oscillation adjustment circuit is also integrated, which is capable of adjusting time counts with digital method, and correc

BU9873 Features

* 2 Connected to the CPU via I C Interface Time (Hour ･ Minute ･ Second, Selectable 12-Hour and 24-Hour Mode Setting) Calendar (Year･Month･Day･Week) Periodic Interrupt Function (Output from INTRB, Ranging from 1 Second to 1 Month) Alarm Interrupt Function (Day-of-Week ･ Hour ･