Newhaven Display Forum

Newhaven Products => TFTs => Topic started by: jhagmar on June 19, 2014, 02:31:24 AM

Title: different voltages for VDD and IOVDD (NHD-2.4-240320SF-CTXL#-FTN1)
Post by: jhagmar on June 19, 2014, 02:31:24 AM
Hi,

I am reading the datasheet for NHD-2.4-240320SF-CTXL#-FTN1, and it is not entirely clear that VDD and IOVDD are allowed to be driven by different voltages. I am thinking about driving the LCD (VDD) with 2.8V, while driving the logic (IOVDD) with 3.3V, to simplify the interface with the rest of the board, which is driven by 3.3V. Would this be a good or a bad idea?

Best Regards,
Jonas
Title: Re: different voltages for VDD and IOVDD (NHD-2.4-240320SF-CTXL#-FTN1)
Post by: Michael_L on June 19, 2014, 09:40:02 AM
VDD and IOVDD can be tied together and both powered by 3.3V.  If you are trying to simply the interface I would recommend using this method instead.
Although doing what you have described may work, I cannot guarantee reliable operation.