UART connection preventing E1 from powering the target

Hi,

I'm using E1 emulator to power the target board. However if my RX pin (on the target board) is connected to the UART to USB board, I get an error that E1 cannot power the target. It works fine otherwise.

I have tried this with two different target boards (one of them the RSKRX board) and two UART to USB adapter boards and I get the same result.

Can anyone explain what's going on?

Thanks

  • It is difficult to reply if you don't say which board or which processor you use.
    Have you checked how much current your board draws by using an external power supply?
  • In reply to FrankL:

    Hi Frank,
    I have tried this on two boards, one is the demo board of the Renesas for RX23T and the other boards is what I made and uses RX23T. I have tried my own board on a power supply and it draws between 18 to 30 mA. E1 could support up to 200 mA and does power the target boards (BOTH) if I disconnect the RX pin of the UART (SCI1: channel 1)
  • In reply to Ehsan:

    Hello,
    on RSKRX23T RxD1 is by default connected to the on-board UART to USB converter in RL78/G1C.
  • In reply to FrankL:

    I know, but I'm not using the RL78/G1C. I use JA2 header. Do you see any connection between this piece of information to my question?
  • In reply to Ehsan:

    Ehsan,

    Are you trying to use the Segger J-link port to communicate?

    Mike Clements
    RenesasRulz Moderator
  • This thread will be archived due to inactivity.

    Mike Clements
    RenesasRulz Moderator