Print Page - 89v51RD2FN device signature recognition problem

Title: 89v51RD2FN device signature recognition problem
Post by: rajesh K on January 03, 2009, 05:33:12 AM

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.

Title: Re: 89v51RD2FN device signature recognition problem
Post by: Jan Waclawek on January 05, 2009, 06:23:09 AM

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

Title: Re: 89v51RD2FN device signature recognition problem
Post by: Andy Ayre on January 05, 2009, 08:23:00 AM

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

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

Andy

Flash Magic Forum

In-System Programming Support => P89V51Rx2/P89LV51Rx2 => Topic started by: rajesh K on January 03, 2009, 05:33:12 AM