Author Topic: NHD-0420CW-Ax3 I2C VDD level  (Read 691 times)

tumbleweed

  • Newbie
  • *
  • Posts: 1
  • Karma: 0
    • View Profile
NHD-0420CW-Ax3 I2C VDD level
« on: March 14, 2018, 05:59:04 PM »
Can the NHD-0420CW-Ax3 work with VDD=5V in I2C mode?

In the datasheet I2C interface section it states:
Supply Voltage for OLED and Logic
VDD = 2.8V for 2.8V operation ONLY, 5V mode not supported

Looking at the datasheet for the US2066 controller I don't see any such limit:
Section 10.5 I2C characteristics Ta=25degC, VDDIO = 2.4-3.6 / 4.5-5.5V, VSS =0V

The display datasheet seems pretty clear that it can't, but I was wondering what the limitation is.

Ted_M

  • Administrator
  • Jr. Member
  • *****
  • Posts: 44
  • Karma: 3
    • View Profile
Re: NHD-0420CW-Ax3 I2C VDD level
« Reply #1 on: March 15, 2018, 09:35:05 AM »
Please refer to this post for clarification on the issue of using I2C mode at 5v:

http://www.newhavendisplay.com/NHD_forum/index.php/topic,3953.msg6560.html#msg6560

 

NHD‐0420CW‐AB3 I2C Interface

Started by andersonpdBoard OLEDs

Replies: 1
Views: 4460
Last post January 23, 2015, 10:00:06 AM
by Michael_L
NHD‐0420CW‐AG3 Contrast question

Started by RichardRBoard OLEDs

Replies: 2
Views: 4113
Last post January 16, 2016, 09:52:02 AM
by RichardR
NHD‐0420CW‐AG3: blinking part of text?

Started by RichardRBoard OLEDs

Replies: 2
Views: 4105
Last post February 28, 2017, 03:27:02 PM
by BobG
NHD‐0420CW‐AG3 + I2C + PIC assembly code: trouble getting started

Started by RichardRBoard OLEDs

Replies: 4
Views: 5874
Last post December 17, 2015, 03:12:49 AM
by RichardR
NHD-0420CW-Ax3 Driver (w/demo) written for Parallax P8X32A/Propeller MCU

Started by avsa242Board OLEDs

Replies: 1
Views: 1327
Last post January 09, 2018, 04:48:45 PM
by Paul_B