X1228 Description
The X1 pin is the input of an inverting amplifier. An external 32.768kHz quartz crystal is used with the X1228 to supply a timebase for the real time clock. The remended crystal is a Citizen CFS206-32.768KDZF.
X1228 Key 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 pensation on chip
- Internal feedback resistor and pensation capacitors
- 64 position Digitally Controlled Trim Capacitor
- 6 digital frequency adjustment settings to ±30ppm