ERMSYG-2 is lcd module 20×4 display datasheet character,wide temp, yellow green led backlight,stn lcd,3v/5v power,parallel interface,hd or. · Fax · · [email protected] LCD MODULE 4×20 – mm WITH LED BACKLIGHT Y/G. This is a basic 20 character by 4 line display. Utilizes the extremely common HD parallel interface chipset (datasheet). Interface code is freely available.

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So first thing we want to do is to understand the functions of the PINS.

You probably noticed I’m using some new functions. One thing I want to teach beginners is to read datasheets, in my opinion very valuable skill to have. I don’t want to elaborate more on these confusing lines, just see the picture below with the starting addresses of each line: We understand you probably worry whether we still offer the display after your long development time.

DR register on the other hand will be used for writing the data you want for the display to show not exactly accurate. Final step you have to take to initialize the display. Basically in entry mode you configure whether the address counter AC will increment or decrement automatically and whether the display will shift instead of the cursor.

Data register for write and read. Please refer to page 28 in datasheet.

LCD Module 20×4 Display Datasheet Character,HD,Black on YG

It’s not that vatasheet believe me. Just enable the pins D7-D4 pins accordingly, either wait for busy flag or for couple ms. This is how I wired it up: See page 24 in datasheet, what command we have to send to read the busy flag, and which bit we will have to read. Essentially improving the previous code.


20×4 Character LCD with LED Backlight (Parallel Interface), Black on Green

I couldn’t figure out how to merge with 4 bit function, because it is slightly different. Please see the Figure 24 on page 46 in datasheet. Four high order bidirectional tristate data bus pins. There won’t be anything spectacular about this tutorial, there are already good articles about this stuff for all kinds of devices. Taking into account what I now said, we can construct a simple code for sending a byte. We promise the long terms continuity supply and would never end supply.

For original description please refer to page 8 in datasheet. Write Your Own Review Only registered users can write reviews. Please, log in or register.

20×4 Character LCD Display, 20×4 LCD Display, LCD Display – Winstar

Taking account all my preferences I have to send this byte: It provides many unique features that are all mentioned over the. You will just have to take my word. We know that HD can hold up to 80 characters in DDRAM, also we know that 1st line and 2nd line acts as a single 40 character line.

Important is to remember what is shown in figure 9 on page Instruction register for write Busy flag: Simple example how to use the code. If a product was damaged during shipping or the order is incorrect, you must notify us within 2 days of receipt.

Anyway, remember at the beginning I was describing how the data is sent to the HD It has to be twice, since we are sending the upper bits and the lower bits. So don’t worry about it so much. If you missed it, it’s for storing the data which is currently displayed on the LCD.


I don’t want to elaborate more on these confusing lines, just see the picture below with the starting addresses of each line:. That’s because in eagle by default I couldn’t find one with 20×4.

See the picture below:. Even the xatasheet are the same for these displays. However, most of the displays will use HD as LCD controller, so if you understand how to use a 16×2 or 20×4 display or any character display with this chipset, you should be able to cope with any sized character LCDs. See the picture below: I like to send a pointer to the string of characters and then just increment it until we reach the end. As you can see it has 3 bits called D, C and B.

Hopefully, I was descriptive enough, so you can understand how the character LCD displays are interfaced. We do not give refunds, credit memos. One more thing At this point we kind of have initialized the display, however we have to turn on the display.

In my case I just enabled the display, I don’t want to see the cursor. Pin Function RS Selects registers.

20×4 Character LCD Display

But there is one important thing which I want to elaborate on, I even got confused on this matter. But for initializition, we just turn off the display. Which means, AC will be vatasheet automatically and the display will not be shifted. You can see it below:.