Trying to interface PIC24F and KS0108

[chotasanjiv]

Hello Guys,
Has anybody tried to interface a PIC24 with KS0108, I am using PIC24FJ64GA002 and a 192x64 LCD display using KS0108 controller,
I will appreciated if you can provide any kinda of h/w setup help.
I am running both the LCD and PIC at 4.0 V, so that they can talk to each other, but I only see all pixels turned ON always, not matter what i do.
Regards
Sanjeev

 

[john blue]

**broken link removed**

---------- Post added at 05:24 ---------- Previous post was at 05:22 ----------

https://www.edaboard.com/threads/8639/

---------- Post added at 05:32 ---------- Previous post was at 05:24 ----------

Minumum connection for PIC24F:

 

[bigdogguru]

I am running both the LCD and PIC at 4.0 V, so that they can talk to each other, but I only see all pixels turned ON always, not matter what i do.

According to the **broken link removed**t the minimum required Vdd for viable operation is 4.5V. The **broken link removed** states a maximum operating voltage of 3.6V.

Therefore, you are operating both devices considerably beyond their specifications. A better solution would be to operate the KS0108 at just under 5V and the PIC24 at 3.6V, the KS0108 minimum level for logical high is 0.7Vdd, which at a Vdd of 5V is 3.5V, the same Vdd as the PIC24. The digital only I/O lines of the PIC24 are 5V tolerant and only a few lines of the KS0108 need to be read/monitored, careful planning should allow you to use the PIC24 5V tolerant pins for this task.

I have ported the following KS0108 driver/library to several targets with success. The source includes a PIC16 specific file which you should be able to use as a template for the PIC24.

Universal C Library for KS0108 Based GLCDs

Hope the info helps with your design,

BigDog