introduction to Hitachi HD LCD module, pinout pin detials,instructions set, commands for HD lcd interfacing with microcontroller. Download the Hitachi HD LCD Controller Datasheet and browse our LCDs that use this controller. Version HDU (LCD-II) (Dot Matrix Liquid. Download the Hitachi HD Compatible LCD Controller Datasheet and browse Our LCDs that use this controller. Version HDU (LCD-II) (Dot.

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The HD is capable of operating in 8 bit mode i.

How to use fixed point maths to save microcontroller memory by avoiding use of the floating point library. This is an excellent approach to operate the device with switches first. Thanks so much for your time and works.

HD44780 Character LCD Displays – Part 1

Next article Debouncing a switch. First, with D3-D0 unconnected, these lines will always appear low 0b to the HD when it is in 8-bit mode. Also returns display being shifted to the original position. Under this mode the data or command is transferred to the module using 2, 4 bit nibbles. This means that when enable transitions from high to low, the values of D0 to D7 and RS are read.

Hitachi HD LCD –

The Register Select and data lines are pulled down using a 10K resistor and when the dip switch is closed, those lines go high. Leave a reply Click here to cancel the reply Your email address will not be published. All articles with unsourced statements Articles with unsourced statements from June Commons category link is on Wikidata Commons category link is on Wikidata using P The way it is done here is “safe” but gives a big performance hit at each lcd write operation.


Compatible LCD screens are manufactured in several standard configurations. Selling your cracked, damaged and broken LCD screens is essential to staying competitive in the cell phone repair business. Pinout The module that we are using is a 16 character x 2 line display that we stock over here.

A web surf for hjtachi on the LCD brought me here. In other projects Wikimedia Commons. I promise to use it only to send you MicroZine.

Your email address will not be published. Views Read Edit View history. Go to the shop. Click in the code for the Hitach HD to copy it to the clipboard. You can get the parts for the power supply here. This page was last edited on 17 Septemberat In addition you can also generate your own characters. These characters have to be written to the device each time it is switched on, as they are stored in volatile memory.

Secrets of the Hitachi HD LCD: How to display text and bargraphs.

How to use the BMP for weather pressure measurement or altitude change detection. Those without backlights may have only 14 pins, omitting the two pins powering hitachl light.


For this post I thought I’d try something a little different. This is a lot easier to understand than reading the datasheet, thanks for taking time to write this article. The figure below shows the LCD module and pinout. The Hitachi HD controller has become an industry standard for these types of displays.

Data and commands are sent to the module using the 8 data lines pins and the RS line pin 4. The data sheet does not say much about the contrast voltage; there are a few mostly older, I think displays that need a negative contrast voltage.

Two versions of the ROM have been developed: When you insert the module into the breadboard, you hitachu to hitxchi gentle and work the pins in slowly because the pins are a bit thicker than you would normally use with a breadboard.