DS1501
Overview
The DS1501/DS1511 are full-function, year 2000compliant real-time clock/calendars (RTCs) with an RTC alarm, watchdog timer, power-on reset, battery monitors, 256 bytes NV SRAM, and a 32.768kHz output. User access to all registers within the DS1501/DS1511 is accomplished with a byte-wide interface, as shown in.
- BCD-Coded Century, Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap-Year Compensation Valid Up to the Year 2100
- Programmable Watchdog Timer and RTC Alarm
- Century Register; Y2K-Compliant RTC
- +3.3 (W) or +5V (Y) Operation
- Precision Power-On Reset
- Power-Control Circuitry Support System Power-On from Date/Day/Time Alarm or Key Closure/Modem-Detect Signal
- 256 Bytes Battery-Backed SRAM
- Auxiliary Battery Input
- Accuracy of DS1511 Better than ±1 Minute/Month at +25°C
- Day-of-Week/Date Alarm Register
