vdd_arm_cap, vdd_soc_cap Output voltage??

[kimkisoo]

Hello NXP,

I made a board consisting of i.mx6 solox + pf3000.
CPU: MCIMX6X2AVN08AB
PMIC: MC34PF3000A3EP

After power on, VDD_ARM_CAP, VDD_SOC_CAP voltage do not rise.
After turning on the power,
CPU Side
  - VDD_ARM_CAP: 0.06V
  - VDD_SOC_CAP: 0.139V
  - PCIE_VP_CAP: 0.07V
  - VDD_HIGH_CAP: 2.5V
  - VDD_SNVS_CAP: 2.5 V
  - NVCC_PLL: 1.12V

PMIC Side
  - SW1A: 1.376V
  - SW1B: 1.370V
  - SW2: 3.31V
  - SW3: 1.347V

The PMIC voltage output is normal.
However, the CPU's VDD_ARM_CAP and VDD_SOC_CAP are not output.

I do not know why the output voltage does not rise.

Thank you for your help.

Kim Ki Soo.

[igorpadykov]

Hi Kim

one can check hardware using AN5161 Powering an i.MX 6SX-based system using the
PF3000 PMIC

https://www.nxp.com/docs/en/application-note/AN5161.pdf 

IMX6SXHDG Hardware Development Guide for i.MX 6SoloX

http://www.nxp.com/assets/documents/data/en/user-guides/IMX6SXHDG.pdf

First, one can check VDD_SNVS_IN, VDD_HIGH_IN with oscilloscope,

if clocks are operating properly.

Best regards
igor
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[kimkisoo]

Hi igorpadykov

As you said, while checking VDD_SNVS_CAP and VDD_HIGH_CAP, I confirmed that the artwork error was short.

When the short is removed, the normal voltage is output.

Thank you very much.

Best Regards

kim ki soo