Well after some time i had the oportunity to try to figure out the pinouts for this LCD.
It has 20 pins
This was what i got:
1 – GND
2 – power +5V
3 – V contrast ?? doubt
4 – RS
5 – R/W
6 – E
7 – DB0
8 – DB1
9 – DB2
10 – DB3
11 – DB4
12 – DB5
13 – DB6
14 – DB7
15 – CS
16 – Reset
17 – VLCD ??? Doubt
18 – N/C
19 – N/C
20 – N/C
Now my problem is with the contrast voltages those two pins i don't realy know what they are , but they have to do with the contrast and negative voltage input's , the pin 3 conect to a transistor (the only one in the picture) it conect's to the base of it , so probably this is an input for the tension for the contrast that will drive the transistor , the other pin 17 also conects to the same transistor , to it's colector pin , there is also an alectrolitic capacitor that conect's it's positive pole to the ground and the negative pole to the same pin 17 , tha indicates tha this is a negative tension that passes here , the only boubt is if it is an input ou an output , has the LCD has two more chips near the main controler , it has an 74hc390 (Two BCD decade or bi-quinary counters) and an LA6324N operational amp the seams to be relatied to the transistor , so i don't realy know if this is an DC-DC inverter on an simple input (gessing if this is an output is easy , but if ir is an input wha is the tension for this pin and for the other ??
Samtech
PS :If anyone has any software for this controler please send it to me for my email
samtech@netcabo.pt
So if anyone
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