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DS1315：隐含时钟芯片

The DS1315 Phantom Time Chip is a combination of a CMOS timekeeper and a nonvolatile memory controller. In the absence of power, an external battery maintains the timekeeping operation and provides power for a CMOS static RAM. The watch keeps track of hundredths of seconds, seconds, minutes, hours, day, date, month, and year information. The last day of the month is automatically adjusted for months with less than 31 days, including leap year correction. The watch operates in one of two formats: a 12-hour mode with an AM/PM indicator or a 24-hour mode. The nonvolatile controller supplies all the necessary support circuitry to convert a CMOS RAM to a nonvolatile memory. The DS1315 can be interfaced with either RAM or ROM without leaving gaps in memory.

关键特性 Real-Time Clock Keeps Track of Hundredths of Seconds, Seconds, Minutes, Hours, Days, Date of the Month, Months, and Years Automatic Leap Year Correction Valid Up to 2100 No Address Space Required to Communicate with RTC Provides Nonvolatile Controller Functions for Battery Backup of SRAM Supports Redundant Battery Attachment for High-Reliability Applications Full ±10% VCC Operating Range +3.3V or +5V Operation Industrial (–40°C to +85°C) Operating Temperature Ranges Available

DS1315：原理框图

数据手册DataSheet

关键参数

技术资料

• Tips for Writing Bulletproof Real-Time Clock Control Code
• State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks
• Oscillator Design Considerations for Low-Current Applications
• Selecting a Backup Source for Real-Time Clocks
• Using the DS32kHz with Maxim Real-Time Clocks
• Using the SmartWatch/Phantom Clocks with a Microcontroller
• Lithium Coin-Cell Batteries: Predicting an Application Lifetime
• Design Considerations for Maxim Real-Time Clocks
• Crystal Considerations with Maxim Real-Time Clocks (RTCs)
• Using the Dallas Phantom Real-Time Clocks (RTCs)

质量和环境数据

• DS1315.pdf

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