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Hi
I am using the PSOC BLE Kit
Can anyone tell me if there is a delay between outputting a clock signal on the PSOC 4?
As I am reading the output of the 24MHz Crystal through a pin and its a little bit off.
Also can a anyone tell me if its possible to put the 24 MHz clock off while the PSOC is asleep to save power while keeping the UDB enabled?
Attached pic of Waveform. clock using divider
Thanks
Max Foster
Solved! Go to Solution.
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Is this 24 MHZ clock from ECO or IMO?
If it is ECO, you can switch the CPU to IMO before you go to sleep and stop the ECO. Wnsure that you do not have BLE running at that time.
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I found that the signal has a 5.425 nS rise and full time.
Is there a way of working out the exact clock speed?
Thanks
Max Foster
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Is this 24 MHZ clock from ECO or IMO?
If it is ECO, you can switch the CPU to IMO before you go to sleep and stop the ECO. Wnsure that you do not have BLE running at that time.
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Low Power ap notes that may be helpful -
http://www.cypress.com/documentation/application-notes/an86233-psoc-4-low-power-modes-and-power-redu... AN86233 - PSoC® 4 Low-Power Modes and Power Reduction Techniques
http://www.cypress.com/documentation/application-notes/an90114-psoc-4000-family-low-power-system-des... AN90114 - PSoC® 4000 Family Low-Power System Design Techniques
http://www.cypress.com/documentation/application-notes/an92584-designing-low-power-and-estimating-ba... AN92584 - Designing for Low Power and Estimating Battery Life for BLE Applications
http://video.cypress.com/video-library/search/psoc+4+low+power/
With respect to timing, there is a summary report on Results tab, workspace explorer, but it
does not give you internal vs pin timing on a clock signal. Of course your timing is impacted
by externals, such as C loading, PCB routing delays, and currently there is no way of inputing
that to Creator timing analyzer. The timing file is xxxxx_timing.html
Regards, Dana.