In Circuit Programming AN for HCS08, HCS12

[Andik]

Hello,

I would like to ask if somebody knows, is there any recommended system design which should be reference for designer to meet ICP (ISP) programming needs?
I'm talking about BDM, and specially about cases, when e.g. RESETn or BKGD signal is coupled with port signal. In this case, using jumpers is my first idea, what is expert's opinion and consideration?

Thanks for reactions...

[Man_Softec]

Hello Andik,

If you are using BDM connection for in-circuit debugging, then you cannot share the BKGD pin with other I/O port. Since after reset, the BKGD pin becomes dedicated serial interface pin for the background debug mode. That's why you cannot share with other I/O pin when debugging. You can only use that pin for I/O port when standard alone (without in-circuit debugging).

By the way, what kind of debugger are you using? You may find some efficiency development in the following site:

http://www.softecmicro.com/index.html

[Andik]

Thank you for answer.