Newhaven Display Forum

Newhaven Products => Character LCDs => Topic started by: Felix on August 28, 2015, 04:07:35 AM

Title: R/W signal NHD-C0216CZ-FSW-FBW-3V3
Post by: Felix on August 28, 2015, 04:07:35 AM
In the data sheet of the NHD-C0216CZ-FSW-FBW-3V3 (NHD-C0216CZ-FSW-FBW-3V3) there is a column R/W. The signal is used for commands "Read Busy flage and address" and "Read data from RAM".

This pin is on the ST7030 controller. But it is not on the 10-pin interface of NHD-C0216CZ-FSW-FBW-3V3.

Does this mean reading from the display is not possible?

Felix
Title: Re: R/W signal NHD-C0216CZ-FSW-FBW-3V3
Post by: Saurabh_B on August 28, 2015, 09:18:17 AM
Yes, unfortunately with the serial interface the controller's serial data pin is an input only. You would not be able to read from this display.
Title: Re: R/W signal NHD-C0216CZ-FSW-FBW-3V3
Post by: Felix on August 31, 2015, 12:50:48 AM
Thanks for the information.

Felix
Title: Re: R/W signal NHD-C0216CZ-FSW-FBW-3V3
Post by: Felix on August 13, 2018, 03:14:56 AM
Yes, unfortunately with the serial interface the controller's serial data pin is an input only. You would not be able to read from this display.
Therefore the display does not acknowledge a I2C access? On the display data sheet there is nothing mentioned. But the ST7032 LCD Controller datasheet describes this (http://www.newhavendisplay.com/app_notes/ST7032.pdf (http://www.newhavendisplay.com/app_notes/ST7032.pdf) page 11+12, Figure 4).

Regards Felix