DS1305EN+T&R 实时时钟IC

DS1305EN+T&R

Serial Alarm Real-Time Clock

实时时钟 Serial Alarm RTC 3-Wire

DESCRIPTION DS1305EN+T&R

The DS1305EN+T&R DS1305 serial alarm real-time clock provides a full binary coded decimal (BCD) clock calendar that is accessed by a simple serial interface. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. In addition, 96 bytes of NV RAM are provided for data storage. The DS1305 will maintain the time and date, provided the oscillator is enabled, as long as at least one supply is at a valid level.

An interface logic power-supply input pin (VCCIF) allows the DS1305 to drive SDO and PF pins to a level  that is compatible with the interface logic. This allows an easy interface to 3V logic in mixed supply  systems.

BENEFITS AND FEATURES DS1305EN+T&R

• Completely Manages All Timekeeping Functions

o Real-Time Clock (RTC) Counts Seconds,

Minutes, Hours, Date of the Month,

Month, Day of the Week, and Year with

Leap-Year Compensation Valid Up to 2100

o 96-Byte, Battery-Backed NV RAM for

Data Storage

o Two Time-Of-Day Alarms,

Programmable on Combination of

Seconds, Minutes, Hours, and Day of the

Week

• Standard Serial Port Interfaces with Most

Microcontrollers

o Supports SPI (Serial Peripheral Interface)

Modes 1 and 3 or Standard 3-Wire

Interface

o Burst Mode for Reading/Writing

Successive Addresses in Clock/RAM