SICForever
New member
Hi Everyone,
I just purchased the above unit and had a few quick questions. I am looking at section 4 of the data sheet, Absolute Max. Ratings. It is written that the Supply Voltage For LCD Vout is typically -5V, and then bellow in electrical characteristics it says supply voltage for LCD is typically 4.5. I realize that the symbols are different but what exactly is the difference between the 2 terms?
I have gotten the LCD backlight and the contrast to work (I think, not 100% sure what i'm actually looking for, is the black background that occurs when changing the resistance of the pot connected to the contrast what i'm going for?)
I have one pin I am unsure of what to do with it, and I can't find any mention other then the pinout diagram. Pin 7 (NV) is a negative voltage option. Why and how would this be used?
The datasheet says to refer to table 27 for a list of available commands, but I am unable to find a table that looks like what I'm searching for, or one that is labelled as such. Am I just completely missing it, or are they referencing another document other then the unit data sheet?
I had a few questions on what the short forms on the data sheet mean.
AC timing for interface . . .. what does AC refer to ?
I am assuming that E and Chip Select are being interchanged throughout the data sheet
the C not/D on the timing diagram is referring to A0 correct? (data or control)
The E on the timing diagram, is this referring to the chip select? I thought it was but then furthur down
I notice a CS not which made me start wondering.
I am using the PIC16F877 programming with ASM, I'm not sure what i'm going to do with the second chip select yet as all of my I/O are filled. But I will look at that another day.
Thank you very much for any assistance you may offer.
SIC
I just purchased the above unit and had a few quick questions. I am looking at section 4 of the data sheet, Absolute Max. Ratings. It is written that the Supply Voltage For LCD Vout is typically -5V, and then bellow in electrical characteristics it says supply voltage for LCD is typically 4.5. I realize that the symbols are different but what exactly is the difference between the 2 terms?
I have gotten the LCD backlight and the contrast to work (I think, not 100% sure what i'm actually looking for, is the black background that occurs when changing the resistance of the pot connected to the contrast what i'm going for?)
I have one pin I am unsure of what to do with it, and I can't find any mention other then the pinout diagram. Pin 7 (NV) is a negative voltage option. Why and how would this be used?
The datasheet says to refer to table 27 for a list of available commands, but I am unable to find a table that looks like what I'm searching for, or one that is labelled as such. Am I just completely missing it, or are they referencing another document other then the unit data sheet?
I had a few questions on what the short forms on the data sheet mean.
AC timing for interface . . .. what does AC refer to ?
I am assuming that E and Chip Select are being interchanged throughout the data sheet
the C not/D on the timing diagram is referring to A0 correct? (data or control)
The E on the timing diagram, is this referring to the chip select? I thought it was but then furthur down
I notice a CS not which made me start wondering.
I am using the PIC16F877 programming with ASM, I'm not sure what i'm going to do with the second chip select yet as all of my I/O are filled. But I will look at that another day.
Thank you very much for any assistance you may offer.
SIC
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