JTAG Communication failure after programming

BUG in c51v808a.exe?

When i first connect the ULink the JTAG device ID is found and it is possible to program the device.
After programming the device ID cannot been found anymore.
Tried it with two units and both do not show up AFTER programming.
The third (last) shows up all the time but i don't want to programm it because i don't know what happend.

Programmer: Keil ULink
Device: ST upsd3434EV
Software NOW: Keil uVision3 (eval c51v808a.exe) NOW
Software Prev: Keil uVision3 eval uPSD (ST DK3400 kit)

Does the programmer blow op the device's JTAG interface. (uC is working afterwards, can't see if software is updated)

The hardware worked before because al three devices have been programmed and re-programmed various times.
The only difference is:
- I got a new PC and installed the newest Keil software to see if there are any changes since hte uPsd version.

NOW the question: Are there other people which have got the same problem?

Parents
  • Hello Bart,

    ST recently had an issue with the JTAG ID-Code on some of their uPSD devices. It could be solved with an update of the programming software you are using (PSDsoft, KEIL, CAPS, WinFlink, whatever...)

    I don't know if this helps in your case, but I think (IIRC) that the uPSD3434 is affected.

    Follow this link:
    mcu.st.com/.../modules.php
    and check the product change notifications from december 2006.

    Carsten

Reply
  • Hello Bart,

    ST recently had an issue with the JTAG ID-Code on some of their uPSD devices. It could be solved with an update of the programming software you are using (PSDsoft, KEIL, CAPS, WinFlink, whatever...)

    I don't know if this helps in your case, but I think (IIRC) that the uPSD3434 is affected.

    Follow this link:
    mcu.st.com/.../modules.php
    and check the product change notifications from december 2006.

    Carsten

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