The CDP68HC68T1 Real-Time Clock provides a time/calendar function, a 32 byte static RAM, and a 3 wire Serial Peripheral Interface (SPI Bus). The primary function of the clock is to divide down a frequency input that can be supplied by the on-board oscillator in conjunction with an external crystal or by an external clock source.

Features

• SPI (Serial Peripheral Interface)

• Full Clock Features

- Seconds, Minutes, Hours (12/24, AM/PM), Day of

Week, Date, Month, Year (0 to 99), Automatic Leap Year

• 32 Wordx8-Bit RAM

• Seconds, Minutes, Hours Alarm

• Automatic Power Loss Detection

• Low Minimum Standby (Timekeeping) Voltage . . . . . 2.2V

• Selectable Crystal or 50/60Hz Line Input

• Buffered Clock Output

• Battery Input Pin that Powers Oscillator and also

Connects to VDD Pin When Power Fails

• Three Independent Interrupt Modes

- Alarm

- Periodic

- Power-Down Sense

• Pb-Free Available (RoHS Compliant)