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upd6464 + 16F877 (ON-SCREEN CHARACTER DISPLAY)

 
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b101101011011011



Joined: 03 Sep 2007
Posts: 7

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upd6464 + 16F877 (ON-SCREEN CHARACTER DISPLAY)
PostPosted: Tue Nov 06, 2007 10:23 am     Reply with quote
Hello, I need a help to initialize upd6464 (NEC) + PIC16F877
upd6464 is ON-SCREEN CHARACTER DISPLAY CMOS, a similar to STV5730A.

upd6464 datasheet:
http://pdf1.alldatasheet.com/datasheet-pdf/view/6976/NEC/UPD6464A/datasheet.pdf

I use a source sample in http://www.iloverc.com/files/OSDCCSC.c but not work correctly

Somebody can help-me to work this circuit?
Thanks!!

Last edited by b101101011011011 on Fri Nov 09, 2007 5:30 am; edited 1 time in total
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Nov 07, 2007 6:19 pm     Reply with quote
Quote:
#include <16F877.H>
#device adc=8
#fuses XT,NOWDT,NOPROTECT,PUT,BROWNOUT,NOLVP
#use DELAY(clock=4000000)

Add the NOLVP fuse. It's essential.
treitmey



Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA

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PostPosted: Thu Nov 08, 2007 11:03 am     Reply with quote
Is this the info?
http://www.necel.com/nesdis/image/S11043EJ4V0DS00.pdf
perhaps the faq can help
http://www.necel.com/en/faq/f_OSD2.html
b101101011011011



Joined: 03 Sep 2007
Posts: 7

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PostPosted: Fri Nov 09, 2007 5:28 am     Reply with quote
Thanks for all.

My circuit is working correctly. The problem was the physical connections of the components.

If anyone wants more information, please send-me email or forum messagem.
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