EmbeddedRelated.com
Forums

MC9S12 DOES NOT RUN WITHOUT BMD

Started by stuartied June 3, 2008
We are hving trouble getting out MC9S12E128MFUE to run without the BDM
interface. Things are OK when reset and run from the P&E interface but
the chip does not run as standalone. What wrong?
Reset circuit on board is OK?
How do you identify that stand alone it doesn't operate?

________________________________

De : 6... [mailto:6...] De la part de stuartied
Envoy: mardi 3 juin 2008 15:27
: 6...
Objet : [68HC12] MC9S12 DOES NOT RUN WITHOUT BMD

We are hving trouble getting out MC9S12E128MFUE to run without the BDM
interface. Things are OK when reset and run from the P&E interface but
the chip does not run as standalone. What wrong?

.


DISCLAIMER:
This electronic transmission (and any attachments thereto) is intended solely for the use of the addressee(s). It may contain confidential or legally privileged information. If you are not the intended recipient of this message, you must delete it immediately and notify the sender. Any unauthorized use or disclosure of this message is strictly prohibited. Faurecia does not guarantee the integrity of this transmission and shall therefore never be liable if the message is altered or falsified nor for any virus, interception or damage to your system.

S12E family has LVR circuit. Brown out detector isn't a must for S12E. I
would start checking write once registers, those that are write many times
when BDM is connected (special mode), and that become write once witout BDM
(normal mode).

Edward
----- Original Message -----
From: "MARC Erwan"
To: <6...>
Sent: Tuesday, June 03, 2008 4:36 PM
Subject: RE: [68HC12] MC9S12 DOES NOT RUN WITHOUT BMD
Reset circuit on board is OK?
How do you identify that stand alone it doesn't operate?

________________________________

De : 6... [mailto:6...] De la part de
stuartied
Envoy: mardi 3 juin 2008 15:27
: 6...
Objet : [68HC12] MC9S12 DOES NOT RUN WITHOUT BMD

We are hving trouble getting out MC9S12E128MFUE to run without the BDM
interface. Things are OK when reset and run from the P&E interface but
the chip does not run as standalone. What wrong?

.

Your code probably does not turn off the internal watchdog timer.

Dave
stuartied wrote:

> We are hving trouble getting out MC9S12E128MFUE to run without the BDM
> interface. Things are OK when reset and run from the P&E interface but
> the chip does not run as standalone. What wrong?
>
>