Is there any reason not to use the KS0108 GlCD?

[TimB]

Hi all

I'm starting on my GLCD terminal + display project where I will develop a universal GLCD display for my projects. I will be able to stream serial data at it and have it display my data along with a few buttons to provide an interface and RX data back.

Looking at all the GLCD's out there and what I need. I'm thinking I can get away with a 128x64. Proton supports built in the KS0108 and despite it being very old now I can get a module that is good on size of display and easy of connection.

But nagging me in the back of my head I remember issues with the speed you could write to it. eg over run over 20mhz and it would stutter and stop working.

I really want to clock my Pic at 64mhz so it will never be slowed doing parsing drawing graphs etc.

Is my memory correct? Is it an issue?

Thanks

Tim

[trastikata]

Is it an issue?

Hi Tim,

I've been using it with 48 MHz PICs and never had a problem.

Probably what you mean is 20 MHz data clock but you can't actually reach that speed with 64 MHz PIC. 

[JonW]

How you feeding it Tim?  Could be the connection is causing slew issues due to board/ cable capacitance.  Have you looked at the data at the PIC Vs Display pins..  Does not take much to reduce pulse widths vs Slew and Logic level etc