I'm trying to interface the Nokia 3310 LCD....... with PIC18F4550( actually integrating USB with this , that is y big chip used)
I am able to understand the protocol in sending the commands and data.....
My doubts are......
The lcd is rated to operate at 3.3 V
-->So suppose i send 3.3 V to the LCD's VDD, but when i am raising or falling the SCLK pin to latch data.....high on the SCLk is 5V bcos it is coming from a PIC micro supplied by a 7805.
-->Is this right?
Or shud i make the pic run with 3.3 V,,,,,,will PIC 18Fmicros run normally at 3.3V??
--> Is it necesary to keep chip( one inside LCD) disabled when not sending any data to it....or is it ok to clear chip enable pin at start and forget abt it.....?
-->I saw a site where 10K pull-ups were used on all 5 "controlled" pins of the LCD
is this critically necessary?
-->for initialisation.......i am using the set
0X21
0X13
0XC2
0X04
0X20
0X09
0X08
0X0C
0X40
0X80
MSB first and then go on for data send.
Is this Ok
I've attached my microBasic code.....well...its not working....
Any response is very much appreciated.