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
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Support Communities
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nmi_handler __BKPT(0); occurs when receiving data from UART2
... uart_cfg); #endif // Set pad functionality set_pad_functions(); // Enable the pads GPIO_set_pad_latch_en(true); } I'm using USB Dev Kit with cables connected to my own board and SDK_6.0.20.1338. Could you help me? Thanks. Best regards, Javier
Sep 17, 2024 -
DA14531 Authentication and Paring
Hello Renesas community, I have two BLE variants 1) one should connect with authentication, 2) second it should connect without authentication, But both should happen with same software, I can differentiate these scenario by using VCU signal. When ever the mobile app asks for the parring code user_app_on ...
Jun 9, 2025 -
DA14531- Power profile issue
Hi sir, i am working on DA14531, after flashing the code into DA14531 then i started checking for power profile using smart snippets toolbar v5.0.24 it detects the device and J-tag, but it won't show the power profile. what can be the issue behind this problem ...
May 2, 2024