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Renesas Electronics Corporation

How to Use Real‑Time Clock to Get Current Time on RA8E1 Fast Prototyping Board

How to Use Real‑Time Clock to Get Current Time on RA8E1 Fast Prototyping Board
Apr 7, 2026

About This Video

Learn how to use the real‑time clock (RTC) module on the RA8E1 fast prototyping board to track and display the current time. We configure the RTC in the flexible software package (FSP), including selecting the low‑speed on‑chip oscillator (LOCO) as the clock source. The project demonstrates how to set the initial date and time through user input and retrieve the RTC calendar values during runtime. The application continuously reads and displays the current time at regular intervals using the SEGGER RTT Viewer, showcasing how the RTC maintains accurate timekeeping.