The iMX28 generated VDDIO is on all of our boards 3.4V, although the 8004_4060(hex) register is set via software to 0004230a(hex).
VDDA and VDDD however have exactly the voltage that I expect based on the respective register values.
Does anybody know where this VDDIO deviation come from? Thank you.
For completness:
Absolute address (hex): Value(hex)
8004_4000: 00018024
8004_4010: 20308593
8004_4020: 00000040
8004_4030: 00010000
8004_4040: 0002071c
8004_4050: 0000270c
8004_4060: 0004230a
8004_4070: 00000230
8004_4080: 00000018
8004_4090: 00000000
8004_40a0: 0000305f
8004_40b0: 00167021
8004_40c0: 01141210
8004_40d0: 0000ff00
8004_40e0: 01f90e0f
Solved! Go to Solution.
Hi David
the output accuracy of the switchers is +/- 3%.
So programming as 3.3V (TRG=0xA) one can get 3.4V ( 3% deviation).
One can program voltage value with one step less.
Best regards
chip
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Hi David
the output accuracy of the switchers is +/- 3%.
So programming as 3.3V (TRG=0xA) one can get 3.4V ( 3% deviation).
One can program voltage value with one step less.
Best regards
chip
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------