Problem programming MC9S12XF512MLM with Freescale Development Card

[Kartoon67]

Hi,

I'm goinf to explain my problem the more clearly as possible. I have a problem in programming my MCU, CodeWarrior say the following errors :

"Communication with target failed :

The target MCU as no clock or wrong BDM clock speed is used or derivative is secured"

Yesterday, I did my programmation correctly with no problem. But today, i try to flash my MCU and in a moment, i lost the programmation with my USB Multilink, more clearly i was disconnect during the programmation of my MCU.

After that, i can't program again my MCU, the watchdog LED present in the development card are already RED, and i can't reprogram for now...

I have verify the power supply of my MCU. Allready is good, just the PIN RESET is now to 0V... or it must be 5V...

Somebody can help me?

Thanks in advance,

Regards,

[kef]

• ... the watchdog LED present in the development card are already RED
• ...just the PIN RESET is now to 0V... or it must be 5V...

Do you have external watchdog on board? MCU can't be flashed while /RESET is low. Try disconnecting /RESET pin from watchdog.

[Kartoon67]

Yes the watchdog is external. In the development card, this pin is present in the MC33742 compone.nts.The thing that i don't understand is it why now i can't flash my MCU then that yesterday it's work perfectly.

Concerning your proposal to disconnect the pin, i think i can't. Because the pinof the watchdog is not really connected to my MCU. But i'm not sure.

I'm sending you here the .PDF of the development tool card, maybe you can say me something about that.

Thanks in advance

[kef]

Try removing J27 jumper, which connects /RESET with MC33742. 

[Kartoon67]

The Jumper J27 was already removed... Something is pushing the /RESET pin to GND but i don't know what...

[Kartoon67]

And following the connection between the button RESET, the capacitor C1 and the pin /RESET for the MCU. I removed the button and the capacitor C1. I verify the resistance R3, it is right 2.2Kohm. Following this, my VDD must to be connected directly to the pin /RESET.

But even this, my pin RESET it's still to 0V... I really don't understand. Could be the MCU broken?

[kef]

Provided all supply voltages are OK, yes, it looks like a damaged part.

What maskset it is? Isn't it 0M64J? I'm asking because MUCts03700 and MUCts03702 erratas are very suspicious.

[Kartoon67]

The mask set are :

-0M64J              $D480                 0xFFFF
-1M64J              $D481                 0xFFFF
- 2M64J             $D481                 0x0006

It depend between the Part ID and the version ID. So i can't choose between the three because i don't know which part i'm using... If it is the MCU which is problem, it is very sad. Because i think that the MCU could have a minimum of strenght.

Obvisously...not.