时钟芯片ZC1302完全替代DS1302

四维电子

BENEFITS AND FEATURES
Completely Manages All Timekeeping Functionso Real-Time Clock Counts Seconds,Minutes, Hours, Date of the Month, Month,Day of the Week, and Year with Leap-YearCompensation Valid Up to 2100o 31 x 8 Battery-Backed General-PurposeRAM Simple Serial Port InteRFaces to MostMicrocontrollerso Simple 3-Wire Interfaceo TTL-Compatible (VCC = 5V)o Single-Byte or Multiple-Byte (Burst Mode)Data Transfer for Read or Write of Clock orRAM Data Low Power Operation Extends Battery BackupRun Timeo 2.0V to 5.5V Full Operationo Uses Less Than 300nA at 2.0V 8-Pin DIP and 8-Pin SO Minimizes RequireDSPace Optional Industrial Temperature Range: -40°Cto +85°C Supports Operation in a Wide Rangeof Applications Underwriters Laboratories® (UL) Recognized
3 Z2 P1 ^* N- e2 L' E3 h5 p5 KDETAILED DESCRIPTION
The ZC1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. Itcommunicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds,minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted formonths with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or12-hour format with an AM/PM indicator.Interfacing the ZC1302 with a microprocessor is simplified by using synchronous serial communication. Only threewires are required to communicate with the clock/RAM: CE, I/O (data line), and SCLK (serial clock). Data can betransferred to and from the clock/RAM 1 byte at a time or in a burst of up to 31 bytes. The ZC1302 is designed tooperate on very low power and retain data and clock information on less than 1µW.The ZC1302 is the successor to the DS1202. In addition to the basic timekeeping functions of the DS1202, theZC1302 has the additional features of dual power pins for primary and backup power supplies, programmabletrickle charger for VCC1, and seven additional bytes of scratchpad memory

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