Dear all,
Would you tell me about precision for VDD_xxx_CAP of i.MX6Solo?
- VDD_ARM_CAP
- VDD_SOC_CAP
- VDD_PU_CAP
The value of each VDD_xxx_CAP is as follows.
- VDD_ARM_CAP;1.225~1.400
- VDD_SOC_CAP;1.15V~1.125V
- VDD_PU_CAP;1.15V~1.125V
I understand that these values are values to be set in each Set points.(not measured voltage value)
Is my understanding correct?
In 996MHz operation,
When the Set Point of VDD_ARM_CAP is set to 1.225V, the measured voltage is 1.246V.
Is this correct operation?
How much is a precision(margin of error) for each VDD_xxx_CAP set points?
May I have advice?
Best Regards,
Yuuki
Solved! Go to Solution.
The typical accuracy of the VDD_xxx_CAP LDO set points is +/- 25mV.
Have a great day,
Artur
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Dear Artur-san,
Thank you for your answer
I understood it.
Best Regards,
Yuuki
The typical accuracy of the VDD_xxx_CAP LDO set points is +/- 25mV.
Have a great day,
Artur
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Note: If this post answers your question, please click the Correct Answer button. Thank you!
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Dear Artur-san,
Thank you for your support.
We use ARM frequency at 996MHz.
We set VDD_xxx_CAP LDO set points as follows then.
However, the actual measured value comes to have a bigger around +30mV than a set point value.
CAP set point value actual value
VDDSOC_CAP: 1.20V => 1.230V
VDDPU_CAP : 1.20V => 1.230V
VDDARM_CAP: 1.25V => 1.280V
These exceed +-25mV accuracy.
Is the explanation of the data sheet a set value?
or
Does it mean actual value?
If it means an actual value, these violate a data sheet.
We want to check whether this operation does not have a problem.
As we are before a mass production, we want to confirm it as soon as possible.
Best Regards,
Yuuki
At relatively relaxed loads, the actual voltage values can slightly exceed this +25mV tolerance. This does not affect the system operation.