2008-10-16 22:56:47 Questions about PPI_FS3?
Wei Jiang (CHINA)
My hardware is bf561, I want to use tthe PPI with "3 internal Frame Syncs" mode.
It says "The state of PPI_FS3 depends completely on the state of PPIx_FS1 and/or PP!x_FS2, so PPIx_FS3 has no inherant programmability". In my test, PPI_FS3 is always be the half of PPIx_FS2.
It has no effect by setting the PORT_CFG in the PPIx_CONTROL register. What's the difference when I set PORT_CFG[1:0] to 01 and 11?
If PPI is working with "3 internal Frame Syncs" mode, then the frequency of PPIx_FS3 can only be the half of PPIx_FS2 and can't be changed by setting the registers??
Thanks, any clue is appreciated!