RL78G13 can't debug with vcc < 3.5v

Hi everyone,

I'm having trouble while trying to debug the RL78G13 when the VCC applied to it is below 3.5V but I haven't seen anything in the documentation related to that.

Note that when I want to program the MCU using Renesas Flash Programming Tool (RFP) I can do it without any problem.

I'm using the E1 emulator with external power supply at 3.3V and e2 Studio 2021-04 (21.4.0).

The error I'm getting is:

The hardware I have is:

Parents Reply
  • I am assuming that the exact same setup works at 3.5V and above while it does not work at 3.3V, I have never had any problem running at lower voltages. 

    Do you know if your application is running on the MCU at the lower voltages?  Perhaps toggling a port pin at regular intervals to show application progress would be good.

    Have you run the self-check on your E1?  Have you tried another debugger?