SparkFun Forums

[alim]

Hello all;
I bought one small lcd (i.e. LCD-11122). It needs 11 input/output pins for microcontroller interfacing. I am using Arduino pro mini which has 14 I/O pins. So, if I use this LCD, then I do not have enough pins to add more peripherals. I like the size of this LCD and pro-min for my project. Is there any simple solution here without changing microcontroller and LCD?

[n1ist]

If you run in 4-bit mode, you can use 6 pins - 4 data, R/S and E. R/W can be tied to always write if you use delays instead of reading the ready bit. If you need to be able to control the backlight, that will be one more pin. Alternatively, you can use an LCD backpack like LCD-00258 and get it down to one pin.
/mike

[alim]

Thanks Mike for your quick reply. I believe it will be easy for me to go with LCD-00258. Using LCD-00258 to Arduino is very simple (just one pin) and it's library is also available.
I am wondering if I can know the connection between LCD-11122 and LCD-00258. Any link will be good. Thanks in advance.