Real Time Clock/Calendar/CPU
Supervisor with EEPROM
FEATURES
? Real Time Clock/Calendar
—Tracks Time in Hours, Minutes, and Seconds
—Day of the Week, Day, Month, and Year
? 2 Polled Alarms (Non-volatile)
—Settable on the Second, Minute, Hour, Day of the
Week, Day, or Month
—Repeat Mode (periodic interrupts)
? Oscillator Compensation on Chip
—Internal Feedback Resistor and Compensation
Capacitors
—64 Position Digitally Controlled Trim Capacitor
—6 Digital Frequency Adjustment Settings to
±30ppm
? CPU Supervisor Functions
—Power-On Reset, Low Voltage Sense
—Watchdog Timer (SW Selectable: 0.25s, 0.75s,
1.75s, off)
? Battery Switch or Super Cap Input
? 512 x 8 Bits of EEPROM
—64-Byte Page Write Mode
—8 Modes of Block Lock? Protection
—Single Byte Write Capability
? High Reliability
—Data Retention: 100 Years
—Endurance: 100,000 Cycles Per Byte