C6670 performance measurement question

demon popo

Intellectual 625 points

Hi,

The cyclce measure by ccs clock(run->clock) is 210019.

the excution time should be 210019*(1/1.2G)=171us.

but the excution mesasure by ocsilloscope is 1.7ms.

What's wrong with this?

Thank you in advance.

plateform: C6670

CCS version : 5.0.3

over 14 years ago

0 John Dowdal over 14 years ago

TI__Intellectual 2180 points

I suspect the main PLL is running in bypass mode since it is off by 10x.

The PLL can be programmed from CCS using the evmc6670l.gel found in "\Program Files\Texas Instruments\ccsv5\ccs_base_5.0.3.00028\emulation\boards\evmc6670l\gel\evmc6670l.gel". Instructions for using the GEL can be found at http://processors.wiki.ti.com/index.php/BIOS_MCSDK_2.0_Getting_Started_Guide in the subsection "Loading and Setting up the EVM with the Gel file".

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C6670 performance measurement question