Datasheet PT7C4563BQ (Diodes) - 8

PT7C4563BQ Function Description Overview of Functions 1. Clock Function
The CPU can read or write data including the year (last two digits), month, date, day, hour, minute, and second. Any (two-digit) year that is a multiple of 4 is treated as a leap year and calculated automatically as such until the year 2100.
2. Alarm Function
These devices have one alarm system that outputs interrupt signals from INT for PT7C4563B to CPU when the date, day of the week, hour, minute, or second correspond to the setting. Each of them may output interrupt signal separately at a specified time. The alarm may be selectable between on and off for matching alarm or repeating alarm.
3. Programmable Square Wave Output
A square wave output enable bit controls square wave output at pin 7. 4 frequencies are selectable: 1, 32, 1.024k, and 32.768k Hz.
4. Interface with CPU
Data is read and written via the I2C bus interface using two signal lines: SCL (clock) and SDA (data). Because the output of the I/O pin SDA is open drain, a pul -up resistor should be used on the circuit board if the CPU output I/O is also open drain. The SCL's maximum clock frequency is 400kHz, which supports the I2C bus' high-speed mode.
5. Oscillator Fail Detect
When the oscil ator fails, the OSF bit is set. PT7C4563BQ
www.diodes.com
July 2019 Document Number DS41477 Rev 2-2 8 © Diodes Incorporated Document Outline Features Description Pin Configuration Pin Description Function Block Maximum Ratings Recommended Operating Conditions DC Electrical Characteristics AC Electrical Characteristics Recommended Layout for Crystal Cpar = all parasitical capacitor between X1 and X2 Crystal Specifications Function Description Overview of Functions Registers Control and Status Register Time Counter Days of the Week Counter Calendar Counter Communication I2C Bus Interface Overview of I2C Bus System Configuration Starting and Stopping I2C Bus Communications Slave Address Part Marking Packaging Mechanical W (SOIC-8)