Newhaven Display Forum

Newhaven Products => TFTs => Topic started by: jmcpherson on June 16, 2016, 10:47:18 AM

Title: CS for NHD-3.5-320240MF
Post by: jmcpherson on June 16, 2016, 10:47:18 AM
We are evaluating the NHD-3.5-320240MF for a new product.  We want to use the 8-bit parallel mode, but we are confused on what to use for the Chip Select [CS] for the Display.  There is the Data Enable pin [DEN] but that is apparently a no connect.  What do we use so we know that the right data is on the bus at the right time?

James McPherson
Senior Electrical Design Engineer
Sandhill Scientific
Title: Re: CS for NHD-3.5-320240MF
Post by: Saurabh_B on June 17, 2016, 08:02:08 AM
Hi,

If you would like to use the NHD-3.5-320240MF display with 8-bit parallel, I would recommend using an external TFT controller such as the NHD-3.5-320240MF-20 Controller Board (http://www.newhavendisplay.com/nhd35320240mf20-controller-board-p-2656.html).

The display is defaulted to Sync mode so the data-enable signal would not be necessary. However you would need to provide a minimum of 16 bits for the color data along with the H-Sync and V-Sync signals.

The chip select signal will activate the bus so that you could write to the display.
Title: Re: CS for NHD-3.5-320240MF
Post by: jmcpherson on June 17, 2016, 10:56:35 AM
Thank you.  :)
Title: Re: CS for NHD-3.5-320240MF
Post by: jmcpherson on June 17, 2016, 11:10:53 AM
We can support 16 bit parallel, it was the 24bit that was the issue.

How do I connect the data lines to make 16bit work?

James
Title: Re: CS for NHD-3.5-320240MF
Post by: Saurabh_B on June 21, 2016, 11:57:41 AM
James,

THis will depend on your MPU.

You can find the pinouts for the controller board on the spec sheet for the controller. i have also linked a picture of that pinout below.
This controller will have an 8080 type interface with your MPU.