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Internal Refernce voltage for KM14Z below desired value

Question asked by Bharath Poonja on Apr 27, 2016
Latest reply on Jun 28, 2016 by Bharath Poonja

Hi,

 

I have been working with KM14Z microcontroller to read the voltage and current through SAR ADC and the AFE module.

I am using the internal Vref as reference. The voltage i am getting in Vref is 0.26V, Vrefl is 0.1V and Vrefh is 0.28V.

Vref init module,

/* Vref Init */

VREF_Init (VREF_MODULE_CHOP_EN_ICOMP_EN_REG_EN_VREFL_EN_LPWR_CONFIG,

VREF_SWITCH_S1_H_S2_L_S3_L_BUFF_EN);

VREFL_Trim(3);

 

Actual Vref should be around 1.2V. Please help me understand the problem with the code

 

Thanks in Advance.

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