Atmel JTAG MKII - Difference between HW Rev A and B (PDI Programming)

Hi.

The programming interface changed from ISP to PDI on XMega controllers. 
The JTAG MKII can program and debug the XMegas via PDI with a software 
update, but only the newer hardware revisions seem to have the required 
hardware support.

I'm not very happy to discard my current hardware and spend 300� for 
another one.
So my question is: What are the hardware differences between the older 
(non-PDI) and the newer (PDI-enabled) revisions?

My guess is that pin 9 (TDI), which is used as PDI_DATA, is input only 
in the older revisions and bidirectional in the newer ones. So a new 
driver should do the trick.

SMD rework tools are available.

-- 
Mit freundlichen Gr��en

Frank-Christian Kr�gel

Frank-Christian Kr�gel skrev:
> Hi.
> 
> The programming interface changed from ISP to PDI on XMega controllers. 
> The JTAG MKII can program and debug the XMegas via PDI with a software 
> update, but only the newer hardware revisions seem to have the required 
> hardware support.
> 
> I'm not very happy to discard my current hardware and spend 300� for 
> another one.
> So my question is: What are the hardware differences between the older 
> (non-PDI) and the newer (PDI-enabled) revisions?
> 
> My guess is that pin 9 (TDI), which is used as PDI_DATA, is input only 
> in the older revisions and bidirectional in the newer ones. So a new 
> driver should do the trick.
> 
> SMD rework tools are available.
> 

My guess is that it is a complete new board for the updated ICE.
IIRC, The old H/W did not have enough performance to handle PDI.

I think everything produced after Aug 2006 has the new board.

You can check if you have a new ICE, but counting the LEDs.
The old one has three, and the new one has a fourth,
which is inside the plastic.

You can still program & debug, using the JTAG interface.

BR
Ulf Samuelsson