News Release from: Blackhawk
Edited by the Electronicstalk Editorial Team on 14 September 2005
Adapter keeps emulators in time with OMAP
A novel adapter allows JTAG emulators for TI DSPs to synchronise with the adaptive clocking cores of Texas Instruments' OMAP devices.
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Blackhawk has developed a new adapter that allows JTAG emulators for TI DSPs to synchronise with the adaptive clocking cores of Texas Instruments' OMAP devices. The JTAG Adaptive Clocking Kit (JACK) is priced at $149.95 and is available now. The JACK is a cost-effective way to preserve current emulator investment.
It allows the use of legacy emulators to debug the latest OMAP devices without sacrificing features or performance.
The advantage of using adaptive clocking is being able to automatically adjust to the optimum clock rate.
Currently, Code Composer Studio (CCStudio) configuration workarounds for OMAP recommend slowing down the clock frequency, which degrades system performance.
The ARM core has the ability to vary the frequency of its core clock during operation.
This affects RTCK and the optimal TCK frequency that can be achieved, so not being able to adapt to the change in overall clock rate lowers performance and increases the risk of data corruption.
Installation of the 1 inch square PCB adapter is quick and easy because it is keyed (pin 6), matching the standard TI 14-pin JTAG specification on both ends.
This permits it to fit between the emulator's 14-pin end and the target end without any modification.
Also included in the kit is a right-angle connector which can be used for close-tolerance applications.
Using the JACK does not require any changes to the emulator or CCStudio setup.
The adapter will automatically synchronise the JTAG data and clocks for increased speed, stability and data integrity.
This applies best to emulators with a fixed TCK output (eg TI XDS510 ISA emulator).
However, emulators supporting a variable TCK rate can maximise performance by generating the highest output TCK frequency.
Even though speed is enhanced, increasing an emulator's TCK output rate will not affect data integrity.
This applies to all XDS560-class emulators and some newer XDS510 emulators that handle variable TCK rates (eg Blackhawk USB510 and PCI510 emulators).
A detailed description of the adaptive clocking capabilities of OMAP cores is available for download from Blackhawk's website.
The JACK and Blackhawk emulators are available through a worldwide network of industry resellers.
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