Simple question

gorge ss

Other Parts Discussed in Thread: OMAPL138

I was just wondering on what is the best way to measure the cpu clock speed of L1 38. Is there any clk out pin or an I/O which i can hook up to an Oscilloscope and measure.

Any other suggestion would be highly appreciable.

Thanks

over 12 years ago

0 David (ASIC) Liu over 12 years ago

TI__Guru**** 177776 points

Gorge

Please refer to the OMAPL138 TRM: http://www.ti.com/lit/ug/spruh77a/spruh77a.pdf, Figure 8-1 for the PLL block diagram. You can then use OCSEL register to select which clock to observe on the CLKOUT.

Thanks

David

0 gorge ss over 12 years ago in reply to David (ASIC) Liu

Prodigy 160 points

What is the best way to program the OCSEL register to select the clkout. Currently im setting the PLL in bypass mode , then set the clkout , finally set the PLL back in lock mode. Im not sure if thisis the proper way. Any example or document that explains this would be appreciable.

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Simple question