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psypersky
Joined: 06 Jul 2008 Posts: 13
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PCM programmer
Joined: 06 Sep 2003 Posts: 21708
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asmboy
Joined: 20 Nov 2007 Posts: 2128 Location: albany ny
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graphic or character mode? |
Posted: Wed Jul 15, 2009 2:14 pm |
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in the 16F family - the ONLY parts that offer a glimmer of hope for you
are to be found in the datasheet for
PIC16F913/914/916/917/946
best 'o luck |
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psypersky
Joined: 06 Jul 2008 Posts: 13
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Cost |
Posted: Wed Jul 15, 2009 2:14 pm |
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Thanks
I want to do this because an LCD without driver cost about 0.1$/0.2$ DLLS
and this circuit is for an extensive production.
Do you think it's extremely difficult? |
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PCM programmer
Joined: 06 Sep 2003 Posts: 21708
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Posted: Wed Jul 15, 2009 2:16 pm |
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Quote: | the ONLY parts that offer a glimmer of hope for you
are to be found in the datasheet for
PIC16F913/914/916/917/946 |
Those are for segmented LCDs, not dot-matrix LCDs. |
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mkuang
Joined: 14 Dec 2007 Posts: 257
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Re: Cost |
Posted: Wed Jul 15, 2009 2:21 pm |
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psypersky wrote: |
Do you think it's extremely difficult? |
Not difficult, just impossible. There isn't a snowball's chance in hell you will be able to duplicate all the functionality in the driver chip PCM programmer linked to. |
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Ttelmah Guest
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Posted: Wed Jul 15, 2009 2:54 pm |
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I did it some time ago. However the board involved, had a huge amount of logic involved, so I had a FPGA. I generated a small addressable RAM area using this, and the required dot control/timings in the same chip. I think it worked out at about 300 gates....
Basically, unless you have something similar, you can't do this. It is worth considering, if you are in a similar position, with enough external logic to warrant the gate array, but otherwise it'll cost more to control the LCD, than the controller itself.
However, if you only need basic number displays, without dot matrix characters, then much cheaper, and gives a clearer display, to switch to a segmented display, and a PIC that drives these....
Best Wishes |
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