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I'm trying to get some code and so on together, for displaying to a ROHM 16x1 dot matric display. John P. LCD panel can driven by 4 or 8 bits. Commands can be sent in frame of 4 or 8 bits. A reset put the panel in 8 bits mode. Commands: Exec. I don't know if you have access to a Farnell catalog, but they advertise LCD graphic displays with micro interface. These are from Hitachi and from Varitronix. They appear to have an 8 bit interface to them.
Regards Tony. While we are on a LCD thread. There is 4 and 8 bit parallel C code on our BBS. How about touch overlays? Walter Banks. I use a Sony display with x64 resolution which uses an 8-bit interface.
It needs quite a few control lines 6 IIRC , partly because it's made for a bus interface, and partly because the left and right hand sides of the display have a separate enable input. Built-in commands are quite limited i. Frank Frank A. I am interested in seeing the code for it. To all who expressed interest in the 7-segment, 4-digit LCD we are offering: Latest shipment has arrived.
Anybody still needing a data sheet should request private, please - there's a snafu with my ISP preventing the downloading off my page. Dealer inquiries are invited. Does any one know of links for LCD display availability? I need one similar in size to a watch display for an upcoming project. Regards Tony But for venetian blinds, it would be curtains for all of us I don't know if anyone else has thought of this, but just about now there should be a wealth of dead Tamagotchi displays at the bottom of toyboxes everywhere.
I have no idea how difficult they would be to drive, but they ar basically just a small dot matrix display with a few custom icons that you can just ignore. Anybody tried interfacing one of these yet? Martin R. Also, I wasn't necessarily thinking of the 16C9xx series, couldn't you drive these via a cmos latching shift register driven by a PIC, as long as you invert the signal to the LCD at a constant rate? TIA - Martin R.
Green spamBeGone elimar spamBeGone bigfoot. Or, better yet, an electronic 'nanny' for one? What micro do they use, these passing strange toys? Hi PICsters, I need some help please.
I am trying to write the code to drive a standard 2-line by 16 character lcd display from first principles ie from the data sheet. The attached 16F84 program probably contains some subtle blunder I have missed, but I have been working on it for many hours. I am prepared to be embarassed. The problem is the display doesn't do a thing. Not one dot. I have several displays, some with surface mount chips Toshiba T , some with globs of epoxy. Otherwise they are physically the same.
Because all the boards have this same pinout and nomenclature, I have assumed they all share the same instructions and timing requirements. The few spec sheets I have seem to verify this.
I have a detailed T spec sheet that backgrounds the skimpy sheets that come with the lcds. I have an oscilloscope and have verified the timing right at the pads. The setup and hold times are all sub-microsecond for the lcds, so shouldn't be a factor for a 4Mhz ' Sorry for all the words but just trying to fill in the background. I sure would appreciate some comments. Loop until it isn't.
When ; it's free output the byte passed in W, MS nibble first. This is probably an industry standard character LCD, based on Hitchi chip. There are huge amounts of info on driving these, and sample code for PIC's.
Thanks to all those who replied. As Lynn said, it's probably in your hardware. I had not realised the Vo lcd voltage was Vss referenced or that the display was only visible over such a small range.
The optimum Vo voltage seems to be around 0. I didn't have a potentiometer handy and so for many hours laboured over software with Vo tied to Vdd! Does this seem possible using a PIC, given the high density of data for the required graphic images? Obviously I am in the initial design stage and need to consider all the most feasible options before jumping right in.
The purpose of the display is to provide feedback from monitored sensors, probably handled by a separate PIC. Any input is greatly appreciated. I picked up two lcd displays a flea market.
They have markings on them. They are on the back: "SSI" Is this the manufacturer? It has a backlight? Andrew K. Free software, free e-mail, and free Internet access for a month! Try Juno Web: dl. There are lots of information about it.
Should work nicely. Good Luck. The HD is the controller chip, while the HD is the extension for more digits Hi, I have a lcd module with a NEC i think chip on it, I can't find any info on the chip, has anyone got any info or know where I can get specs etc..
LM020L LCD. Datasheet pdf. Equivalent
LM020LN - 5 X 7 DOT MATRIX LCD DISPLAY,16-CHARACTER,1-EDGE HOLES From old datasheet system