OMAP 3530 MCSPI Clock Gating

Joe

Prodigy 10 points

Other Parts Discussed in Thread: OMAP3530

The OMAP3530 is acting as SPI Master.

I am wondering if there is a way for the MCSPI3 Clock output pin to have a free running clock always appear on it.

Changing the registry idle settings does not appear to make the clock persistent.

Thanks in advance!

-Joe

over 14 years ago

0 PaulM over 14 years ago

TI__Mastermind 28015 points

Joe

SPI is designed only to generate a clock while transferring data.

The only way you can generate a continuous clock would be to always transmit data. Even then, you would loose one clock pulse every time the shift register was loaded.

Paul

0 Brad Griffis over 14 years ago in reply to PaulM

TI__Guru*** 125430 points

McBSP can handle that use case. You can setup the frame sync to be generated on "DXR to XSR copies" which will make the frame sync behave similarly to the chip select of SPI, but the clock will run all the time.

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OMAP 3530 MCSPI Clock Gating