If you want to build your own BDM, try looking at the open source OSBDM
cable on Freescales website. It handles multiple Frescale families. Full
source code, schematics, and board layouts are available FREE.
Dave
On 3/2/2011 9:21 AM, carl.bulger wrote:
>
> Hello to All
>
> I am designing my own interface for reading and writing to various
> Freescale MCU's. I've read and written to '908' etc
devices for many
> years with my own interface.
>
> Now I would like to make my own project hardware/software to
> read/write 912D60(A), 912B32 and 9S12DG128 devices via BDM.
>
> All the required commands are published in many tech bulletins on the
> internet but what I cannot find is any information regarding timings.
> In particular the required timings for establishing an auto baud rate
> connection.
>
> Can anyone point me towards a publication/paper? Or if not then please
> give me baud rates for a 912D60A (good a place as any to start I
> think) with the following oscillator speeds:-
>
> 912D60A (for example)
> 16MHz = ? baud
> 8MHz = ? baud
> 4MHz = ? baud
>
> Thanks
> ...