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I had a broken remote for a small RC helicopter that I took the LCD off.

I dont know the size, but I could try to describe the pins and maybe someone could pinpoint what this is.

It has 7 pins, and from the top it is labeled:

  • BZB (not used)
  • BZ (not used)
  • VDD
  • GND
  • DATA
  • WR
  • CS
  • LED-
  • LED+

Just a serial screen? And what are the WR/CS/LED-/+ pins? Thought I could try to hook it up to my Raspberry PI laters if possible.

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    \$\begingroup\$ what is the original chip that LCD was connected to? \$\endgroup\$ Oct 9, 2012 at 12:41

4 Answers 4

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Seems like it:

DATA is probably your input serial data line

WR is probably a write enable

CS seems like a chip select for the control to me

LED- and LED+ are the power and gnd for the backlight

Oh and since there's no clock signal it's probably a uart interface like a RS232 (probably not at RS232 voltage levels though). Maybe try that first messing around with the baud rate until you get some garbage or a character to show up. There's probably also single character commands to clear the LCD which you can figure out by trying. Like sending 0x01 clear or something like that.

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It looks like a Serial LCD, yes.

For the pinout, this is not absolutely certain, but:

DATA = Data In
WR = Write data strobe (i.e. data clock in)
CS = Chip Select - hold either high/low (depending on logic polarity) to enable.
LED + = Backlight LED anode
LED - = Backlight LED cathode

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  • \$\begingroup\$ WR often uses negative logic, i.e. low = write strobe \$\endgroup\$
    – Johan.A
    Aug 9, 2013 at 10:42
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This is the data sheet of the circuit that controller the display.

https://html.alldatasheet.com/html-pdf/950456/ETC2/N79E814AS20/8156/77/N79E814AS20.html

pin1 is CS pin2 is Clock pin3 is Data

Is a Microcontroller, but I do not know, how to program it.

in the microcontroller

Pin 1 is SPICLK, KB0, PWM3, 00.0 Pin 2 is ICPCLK, MOSI, PWM2, P1.7 Pin 3 is ICPDATA, MISO, PWM1, P1.6

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    \$\begingroup\$ You posted a question as an answer to an existing question. This is not how this site works. Please ask a new question by using the button Ask Question in the top right corner. \$\endgroup\$
    – Janka
    Jun 2, 2021 at 23:03
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I have this same LCD, while not being able to get it working with an arduino, i found that the controller sends a clock like (High, Low, High, Low etc..) signal to both the WR and CS pins. I got this from loading the analog read serial sketch to my arduino and then probing the pins. With help from the sketch of greynomad Click Here i found that the controller sends signals at 115200 Baud. Hope this helps!

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