Author Topic: NHD-2.4-240320CF-CTXI#-F spec on VDDIO  (Read 732 times)

mjhuslig

  • Newbie
  • *
  • Posts: 1
  • Karma: 0
    • View Profile
NHD-2.4-240320CF-CTXI#-F spec on VDDIO
« on: November 19, 2016, 01:31:27 PM »
I want to use the NHD-2.4-240320CF-CTXI#-F in a battery application.  The uP and VDDIO connected to the battery and VDD connected to a charge pump controlled by the uP.  When the unit is off, the uP turns off the charge pump and goes to sleep.  Can VDDIO be left powered while VDD is off?  What is the current draw on VDDIO if it were left powered?

Saurabh_B

  • Administrator
  • Hero Member
  • *****
  • Posts: 356
  • Karma: 10
    • View Profile
Re: NHD-2.4-240320CF-CTXI#-F spec on VDDIO
« Reply #1 on: November 22, 2016, 12:18:14 PM »
Hello,

We often recommend tying the VDDIO to the VDD pin.
The 3.3V is still within the safe operating voltage for the Controller IC.

According to the Datasheet (Page 131), the VDDIO needs to be powered down before the VDD.
Datasheet: http://www.newhavendisplay.com/app_notes/ST7789S.pdf

Because of these we have not tried to test power drain while VDD is not applied.

 

NHD-1.8-128160EF-CTXI ili9163 & SAM3s driver help needed

Started by JsaggioBoard TFTs

Replies: 0
Views: 1724
Last post February 01, 2016, 01:02:58 AM
by Jsaggio
NHD-1.8-128160EF-CTXI# problem: becomes pale after using it for some time

Started by fvdhoefBoard TFTs

Replies: 1
Views: 2961
Last post July 31, 2014, 08:55:40 AM
by Michael_L
Writing Character strings to NHD-1.8-128160EF-CTXI#

Started by JeffJwayBoard TFTs

Replies: 3
Views: 2641
Last post July 13, 2016, 09:45:21 AM
by Michael_L
NHD-7.0-800480WF-CTXI# initial problem

Started by cwparkBoard TFTs

Replies: 0
Views: 2149
Last post December 02, 2014, 06:22:04 AM
by cwpark
NHD-1.8-128160EF-CTXI#-F has a display buffer?

Started by statelogicBoard TFTs

Replies: 2
Views: 2622
Last post January 09, 2015, 07:47:13 PM
by statelogic