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Invalid PMCTL value READ on 21469 reset

Question asked by jhenders on Jul 26, 2010
Latest reply on Jul 26, 2010 by DivyaS

This is very frustrating. One day my PLL setup was working fine, basically identical to the example code, and the next day it doesn't work! Here is what I am now getting from *PMCTL upon reset:

 

0x31000 (= 11 0001 0000 0000 0000)

 

According to the HRM Table A-3. PMCTL Register Bit Descriptions, bits 5-0 have a reset value = CLK_CFG[1:0], and likewise, 17-16 have a reset value = CLK_CFG[1:0]. As you can see from above, they are unequal. Not only that but the values for 17-16 point to an invalid pair according to the documentation.

 

My symptom of this problem is that I cannot change the CCLK to be anything but CLKIN!

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