89v51RD2FN device signature recognition problem

[rajesh K]

I used hyperterminal to check... its looping back U's. when i click start in flash magic window, its saying

"device signature can't be read. Proceeding further by inappropriate protocol may make the device unusable. do you want to proceed?"

when i answer YES to that, first 2 steps, 1.Connection Settings, 2.Erasing are done by flash magic.
but third step is not done. It says
                "Unable to connect(transmit/receive)"

what could be the problem? somebody help me out.

[Jan Waclawek]

Try to read signature "manually", from hyperterminal. Enter:
:020000050000f9
it should echo the whole line (changing f to F) and append BF. (this is the manufacturer ID).

I'd guess what you see is a local echo or some loopback or the mcu running some application echoing on the UART, and not the bootloader's echo.

JW

[Andy Ayre]

Please generate a debug file and send it to us. The instructions are here:

  http://www.flashmagictool.com/debugfile.html

Andy