GENERAL DESCRIPTION

    The AT8593 is a CMOS clock/calendar circuit, optimized for low power consumption. Addresses and data are transferred serially via the two-line bidirectional I²C-bus.

    The built-in word address register is incremented automatically after each written or read data byte.

   The built-in 32.768kHz oscillator circuit and the first 8 bytes of RAM are used for the clock/calendar and counter functions. The next 8 bytes may be programmed as alarm registers or used as free RAM space

FEATURES

• I²C-bus interface operating supply voltage: 2.5 to 6.0V

• Clock operating supply voltage (Tamb=0 to +70ºC): 1.0 to 6.0V

• 8 bytes scratchpad RAM (when alarm not used)

• Data retention voltage: 1.0 to 6.0V

• External input resets I²C interface (only)

• Operating current (fscl=0 Hz, 32kHz time base, V_DD=2.0V): typ. 1μA

• Clock function with four year calendar

• Universal timer with alarm and overflow indication

• 24 or 12 hour format

• 32.768kHz or 50 Hz time base

• Serial input/output bus (I²C-bus)

• Automatic word address incrementing

• Programmable alarm, timer and interrupt function

• Space-saving SO8 package available

• Slave address:

• READ A3

• WRITE A2