Well, here we have the same odd behavior with new pieces of MSP430F2418.

We decided to upgrade our old designs based on 1611s and 149s. We got
a couple of samples and bought 75 units of the 2418. All came Rev E.

So far 4 units soldered. And this is the report:

* 2 didn't reported at all on the IAR with our Parallel Programmer.
I just replaced one piece for a fresh one, and it worked right away. I
guess I didn't treated them gently when soldering.

* Other piece worked since the begging. But now, after working on the
code and reprogramming it continuously, can be programed but can't be
debugged. The device performs as an stand alone.

* The last piece, which also worked since the begging, now can't be
re-programed at all.

So, I'm getting quite nervous with this. We are doing as usual, with
our well known tools, testing the latest IAR version, but I guess we
are not being cautious with ESD management.=20

Tomorrow I'll try to test the changes on the capacitors and resistors
which some of you have mentioned. And I'll report.

Mauricio

--- In m...@yahoogroups.com, "augusto_einsfeldt" wrote:
>
> Hello all,
> I cannot access this MSP using JTAG. The message from IAR (version
> 4.10E/W32) is like it cannot innitialize the target (no device found
> or disconnected). I am using the parallel JTAG interface compatible
> with TI FET. This JTAG interface works well with =B4F149 and =B4F1101 (to
> say it is compatible with devices using TEST pin as well).
> Of course I already checked all connections, supply, etc.
> I have signs of life on TMS and TCK pins. TDO is dead (allways 1) and
> TDI is allways zero (I guess the tool does not use TDI in the first
> phase when gattering device identification).
> TEST pins toggles, too, and just for test purpouse I also kept it in
> low state during the debugging tentatives.
> Two other boards were tested and unless the assembly damaged all
> devices it seems the problem is in another place. VCC is 3.3V and I
> did cycle power (with true 0V) to reset JTAG machine.
> Since I did not try to use this MSP before I have no clue if it (or
> the tool) has some difference in the JTAG interfacing (like speed, and
> in this case my cable would be including some delay I did not notice
> with other devices).
> Thanks in advance for any coments or suggestions.
> Best regards,
> Augusto
>

------------------------------------



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Mauricio,

The capacitor at nRST/NMI pin may cause problems for "SBW JTAG". But
you are not (and cannot) use SBW, thus it is probably not the problem.

My experience with F2418 is, the operating voltage range in JTAG mode
is not the same as specified in normal mode.

By itself, what is the voltage of your JTAG Tool? (Across pin 2 & 9 of
the JTAG connector.)

During the test, is your board powered by the JTAG Tool (through pin 2
of JTAG connector)?

If so, what is the voltage with your board as a load?

If not, is your own Vcc connected to pin 4 of the JTAG connector?

My parallel port JTAG tool has only 2.9V by itself. I had problem with
either one of the above arrangements. See:

http://tech.groups.yahoo.com/group/msp430/message/37531

After I raised the voltage to 3.3V, I did not have any problem (yet).

--OCY

--- "vidalastudillo" wrote:
>
> Well, here we have the same odd behavior with new pieces
> of MSP430F2418.
>
> We decided to upgrade our old designs based on 1611s and
> 149s. We got a couple of samples and bought 75 units of
> the 2418. All came Rev E.
>
> So far 4 units soldered. And this is the report:
>
> * 2 didn't reported at all on the IAR with our Parallel
> Programmer. I just replaced one piece for a fresh one,
> and it worked right away. I guess I didn't treated them
> gently when soldering.
>
> * Other piece worked since the begging. But now, after
> working on the code and reprogramming it continuously, can
> be programed but can't be debugged. The device performs
> as an stand alone.
>
> * The last piece, which also worked since the begging, now
> can't be re-programed at all.
>
> So, I'm getting quite nervous with this. We are doing as
> usual, with our well known tools, testing the latest IAR
> version, but I guess we are not being cautious with ESD
> management.
>
> Tomorrow I'll try to test the changes on the capacitors
> and resistors which some of you have mentioned. And I'll
> report.
>
> Mauricio
>
------------------------------------



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