Overview
Description
The 1338 is a serial real-time clock (RTC) device that consumes ultra-low power and provides a full binary-coded decimal (BCD) clock/calendar with 56 bytes of battery backed Non-Volatile Static RAM. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. Access to the clock/calendar registers is provided by an I2C interface capable of operating in fast I2C mode. Built-in Power-sense circuitry detects power failures and automatically switches to the backup supply, maintaining time and date operation.
Features
- Real-Time Clock (RTC) counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to 2100
- 56-Byte battery-backed Non Volatile RAM for data storage
- Fast mode I2C Serial interface
- Automatic power-fail detect and switch circuitry
- Programmable square-wave output
- Packaged in 8-pin MSOP, 8-pin SOIC, or 16-pin SOIC (surface-mount package with an integrated crystal)
- Industrial temperature range (-40°C to +85°C)
Comparison
Applications
Design & Development
Support
Support Communities
Support Communities
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DA14531 I2C Connection Problem
Hi Renesas, I'm trying to connect my DA14531 with DSP using I2C communication but I cant what should I do now?Thanks a lot
Jan 22, 2024 -
DA14531MOD assembly
Hi Renesas, I would like to know if it is possible to write assembly code inside a C project. If it is possible, could you give an example? Thanks. Best regards, Javier
Jun 12, 2024 -
zmodem implementation
Hello,For a school project I need to implement zmodem on the rx.I have seen the xmodem example, which seems to work well.Is there someone who can point me in the right direction for altering the xmodem example to implement zmodem?Is it hard to do? As far ...
Jun 2, 2012