NHD-0216(x)W-IB3 and the SJ1 2.8v/5.0v jumper?

mprowe

• April 29, 2020 01:27

Hi everyone,

Can you clarify the data sheet for these (i2c) devices for me?
If I wish to use them in the 5.0v situation, I should connect them according to the schematic on the left-hand-side of page 5. This is understood.
But how should I treat the SJ1 jumper? Short?

What is the consequence of "not-shorting"?

Is there a schematic available for these products? What are the functions of R6 & R7 - optional I2C pull-up resistors?

Can you offer any advice/application suggestions for interfacing with 3v3 microprocessors? In both situations - with the NHD-0216(x)W-IB3 in 2.8v and again in 5.0v mode.

Regards, Martin

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• 

  Ted M.

  NHD Staff

  • April 30, 2020 09:24

  Hi Martin,
  
  For 3.3V operation, use the 2.8V low voltage setting.  The low voltage I/O setting will work for logic levels from 2.4V up to 3.6V
  
  The jumper SJ1 will connect the 5V VDDIO to REGVDD which turns on the 5V regulator.
  See pages 2 and 3 of the US2066 datasheet for more details: https://newhavendisplay.com/content/app_notes/US2066.pdf 
  
  The resistor locations R6 and R7 would connect the US2066 pins for SCL and SDA to VDDIO.
  
  Regards,

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• 

  elenalloyd

  • July 22, 2020 23:20

  Quote from: Ted_M on April 30, 2020, 09:24:43 AM

  Hi Martin,
  
  For 3.3V operation, use the 2.8V low voltage setting.  The low voltage I/O setting will work for logic levels from 2.4V up to 3.6V
  
  The jumper SJ1 will connect the 5V VDDIO to REGVDD which turns on the 5V regulator.
  See pages 2 and 3 of the US2066 datasheet for more details: https://newhavendisplay.com/content/app_notes/US2066.pdf 
  
  The resistor locations R6 and R7 would connect the US2066 pins for SCL and SDA to VDDIO.
  
  Regards,

   

  Thanks for the info, much appreciated!

   

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