EA DOG

Question:
I just purchased the EA DOGXL160-7 display and a touch panel. I am looking for data sheets on the above-mentioned product. The only thing I could find on your website is the application example for the touch panel which shows how to connect the touch panel to an ATmega AVR processor and nothing else. This application example does not provide any information on how the touch panel works.

Answer:
The touch panel EA TOUCH160-1 (which corresponds to the EA DOGXL160-7) is an analog, 4-wire, resistive touch display. As you see, the 4 wires are connected to the 4 edges on the touch panel.
When you press on it, there will be an electrical contact between the 2 layers of the touch panel. Your ATmega will do something like this:

(1) Connect 5V to the upper edge and 0V to the lower edge.
(2) Read the voltage on the right/left edge
(3) Connect 5V to left edge and 0V to the left edge
(4) Read the voltage on the upper/lower edge

Example:
(2) Read 2.5V and (4) reads 1V

This 2.5V reading tells you that the  “key press” was on a horizontal line which is in the middle of the panel. And the second reading 1.0V indicates   the “key press” on a vertical line near the right edge. The “key” was pressed on the coordinates where both lines intersect.

There’s an interesting application note #341 on   Atmel’s website:
www.atmel.com/dyn/resources/prod_documents/doc8091.pdf

The code that goes with it is here, if you search  #341:
www.atmel.com/dyn/products/app_notes.asp

Question:
I just purchased the EA DOGXL160-7 display and a touch panel. I am looking for data sheets on the above-mentioned product. The only thing I could find on your website is the application example for the touch panel which shows how to connect the touch panel to an ATmega AVR processor and nothing else. This application example does not provide any information on how the touch panel works.

Answer:
The touch panel EA TOUCH160-1 (which corresponds to the EA DOGXL160-7) is an analog, 4-wire, resistive touch display.
As you see, the 4 wires are connected to the 4 edges on the touch panel.

When you press on it, there will be an electrical contact between the 2 layers of the touch panel. Your ATmega will do something like this:

(1) Connect 5V to the upper edge and 0V to the lower edge.
(2) Read the voltage on the right/left edge
(3) Connect 5V to left edge and 0V to the left edge
(4) Read the voltage on the upper/lower edge

Example:
(2) Read 2.5V and (4) reads 1V

This 2.5V reading tells you that the  “key press” was on a horizontal line which is in the middle of the panel. And the second reading 1.0V indicates the  “key press” on a vertical line near the right edge.
The “key” was pressed on the coordinates where both lines intersect.

There’s an interesting application note #341 on   Atmel’s website:
www.atmel.com/dyn/resources/prod_documents/doc8091.pdf

The code that goes with it is here, if you search  #341:
www.atmel.com/dyn/products/app_notes.asp 

Question:
The EA DOGXL uses the UC1610 controller that supports the 2 -bit gray scale. Does the gray scale work with the DOGXL?

Answer:
Yes, that’s a good question. Please  note that  the display also supports the 4 gray levels! It’s simply not mentioned in the data sheet.
On the other hand ‒ and this is the reason why we do not promote it ‒ every gray level  reduces the contrast.  So we suggest   preferential use of the full black color, whenever possible.
But for some small issues, it may be wise to also use the gray levels , e.g. for a disabled function. But for   most display content we
suggest  using the full black/white option.
Here’s the link to the controllers user manual UC1610.
Have fun with it!

Question:
I just purchased and received 2 EA DOGM128W-6 displays from Mouser along with 2 white backlights. Upon opening the package, I can see  2 horizontal lines on the front of the displays. Is this normal or are the displays damaged? Will these lines go away once the display is powered up?
Not to be confused with the 2 diagonal lines and circle ROHS sticker on the back of the display.

Answer:
The black/gray lines  indicate that there are  protection foils  that have to be removed before assembling.

There is a protection foil
- On the front side of the display
- On the rear side of the display
- On the front side of the backlight

Please remove these before mounting and soldering. The RoHS sticker will come off automatically when you pull off the rear side protection foil.