
7 May
2008
7 May
'08
10:59 a.m.
Hi all,
in the i.MX31 processor reference manual they mention a 32 kHz clock as input for several timers and controllers. Sometimes it's called ipg_clk_32k. But the documentation does not clearly state, that this clock actually is the CKIL.
As far as I could derive from the ADS schematics the CKIL is feeded with 32768 Hz instead of 32000 Hz. On our board we use 32768 Hz either.
If CKIL is the above mentioned 32 kHz clock, the resulting deviation in the timers is "only" about 2.4% as long as CFG_HZ in mx31ads.h is 32000 Hz. Although it works with the current definition, I'd like to know your opinions, whether it is necessary to adjust this value.
Thank you for comments.
Best Regards, Jens