Issue about Set the GPIO Voltage on MX6SL

[tony_l_cai]

Hi,all

     I use "mxc_iomux_set_specialbits_register(MX6SL_PAD_AUD_MCLK,PAD_CTL_LVE, PAD_CTL_LVE_MASK)", but after I measured,I found the Voltage was not 1.8V, still 3.2v, when the GPIO signal is 1. So could give me some help?

[igorpadykov]

Hi tony

please check power-up sequence, otherwise chip may be damaged, as

described in sect.7.2.4 Power-up sequence in low voltage system design

IMX6SLHDG Hardware Development Guide for i.MX 6SoloLite

Just for test one can add 47K pull down to GND on gpio and check if that helps.

Best regards

igor

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