Power supply to NVCC_LOW in i.MX6SX

[ko-hey]

Hi all

My customer build a custom board and let me confirm about supplying voltage to NVCC_LOW in i.MX6SX.

Q1.

They don't use SD cad which is 1.8V device.

In that case, they don't have to supply 1.8V voltage to NVCC_LOW.

Am I correct ?

Q2.

Can they supply 1.8V to NVCC_LOW ?

According to the P28 of IMX6SXIEC Rev. 2, 6/2016, it seems that the NVCC_LOW pin can supply  1.8V.

Ko-hey

[Yuri]

Hello

  According to Table 9 (Operating ranges) of IMX6SXIEC (Rev. 2, 6/2016) :

“All digital I/O supplies (NVCC_xxxx) must be powered (unless otherwise

specified in this datasheet) under normal conditions whether the associated I/O

pins are in use or not and the associated IO pins need to have a pullup or pulldown

resistor applied to limit any floating gate current.”

NVCC_LOW should be in range 1.65V - 3.6V.

Have a great day,
Yuri

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[ko-hey]

Sorry, my explanation was appropriate.

I know it need to power the NVCC_LOW pin.

My question is whether user can supply 3.3V to NVCC_LOW when they don't use SD card which is support 1.8V or not.

Can user supply 3.3V to NVCC_LOW instead of 1.8V ?

Ko-hey

[Yuri]

Typically NVCC_LOW should be 1.8 V  for the dual-voltage IOs on the SD3 interface.

When such dual power option is not used - 3.3V is also allowed. 

~Yuri.

[ko-hey]

Okay, thank you !

Ko-hey