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Avnet Employee
JohnW
Posts: 93
Registered: ‎04-20-2009
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OMAP35xx and XDS510 Emulator

Just thought I would post this.  Got this question from an FAE today:


The customer has a XDS510USB JTAG 3V/5V emulator but want to use it with the OMAP which needs 1.8V signaling.  Can the XDS510 be modified to interface at 1.8V?

 

From the Beagleboard-related post on a wiki site: http://elinux.org/BeagleBoardJTAG

"Attention: JTAG on BeagleBoard uses 1.8V!

The 14-pin TI JTAG connector that is used on BeagleBoard is supported by a large number of JTAG emulation products and has been tested using Lauterbach, Spectrum Digital XDS510USB+ and TI XDS560 emulation pods. Note that it will not work with the Spectrum Digital XDS510USB (non-plus) as it does not support a target with 1.8V JTAG."

It would seem that one version of the Spectrum Digital XDS510 (the XDS510USB+) will work at 1.8V.  The plain vanilla one not so much.  I imagine that you could use a voltage translator module, like this one:

However, I could not find anything that specifically says the XDS510USB + voltage translator works with the OMAP35xx.  But, it's reasonable to assume that Spectrum Digital developed the translator for cases just like this.

 
I found this other post on the developer wiki that I thought you might find useful:
 
That helps with loading EBOOT and other bootloaders, but you might need an emulator for customized low-level board bringup (like SDRAM init).