Dear Renesas Support Team,
We are currently using the R5F10RGCGFB microcontroller in our digital timer application. While reviewing the datasheet, we came across the following power-saving modes:
Our concern is as follows:
If the power supply to the digital timer is cut off, we need to ensure that the current time and user-inputted data are retained while consuming the least amount of battery power. Among the available power-saving modes, which one would be the most suitable for achieving this requirement?
We would appreciate your guidance on the best approach for our application.
Best regards,
LEE
Hello,
The low power modes are explained in detail on CHAPTER 19 STANDBY FUNCTION. Table 19-1 lists the state of every peripheral/module during HALT mode and Table 19-2 the state during STOP mode.
As far as I understand you are interested in a RTC (Real Time Clock) application that keeps the time ?
The RTC is operable both in HALT and STOP mode (if the sub-clock oscillator keeps also operating).
Let me know if you have further questions.
Here are a couple of low-power app-notes for RL78 devices, most of the info would apply to the L12 device.
RL78 Family RL78 Low Power MCU Application Note
RL78/F13, F14 Standby Function