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<DIV><FONT face=Arial size=2>Ak je ta SRAM 10ns, tak na dane operacie
potrebujete min. (15ns+prechodove javy na datovej zbernici)*2 coz mi realne
vychadza 40ns > 36MHz???</FONT></DIV>
<DIV><FONT face=Arial size=2>Ale mozno niecomu nerozumiem a mozem sa aj
mylit...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Milan</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=milger@pobox.sk href="mailto:milger@pobox.sk">Milan</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=hw-list@list.hw.cz
href="mailto:hw-list@list.hw.cz">HW-news</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, June 15, 2011 11:27
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: obsluha pameti - VHDL</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Nie celkom rozumiem, 4 operacie /4cykly/ s
SRAM rychlostou 36MHz? Aka je ta SRAM rychla?</FONT></DIV>
<DIV><FONT face=Arial size=2>Mozno by bol dobry zdrojak...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Milan</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=hw@itherm.cz href="mailto:hw@itherm.cz">hw@itherm.cz</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=Hw-list@list.hw.cz
href="mailto:Hw-list@list.hw.cz">Hw-list@list.hw.cz</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, June 15, 2011 10:45
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> obsluha pameti - VHDL</DIV>
<DIV><FONT face=Arial size=2></FONT><FONT face=Arial
size=2></FONT><BR></DIV>
<DIV><FONT face=Arial size=2>kdyz je tady takovy klid, tak mi snad nekdo
pomuze pri boji s CPLD, VHDL, SRAMkou.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>resim zarizeni ktere prevadi vektorovy obraz na
klasicky VGA. (vstupem je X,Y, jas, vystup VGA)</FONT></DIV>
<DIV><FONT face=Arial size=2>v zarizeni je CPLD 95144, ram AS7C34098A,
rychle AD prevodniky., oscilator na 50MHz pripadne 80MHz</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>podarilo se mi nejak odladit zdrojak pro
generovani 640x480 pri 60Hz</FONT></DIV>
<DIV><FONT face=Arial size=2>chtel bych se ale presunout na 800x600 pri
56Hz</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>to co mi nejde je jak ciste vyresit rizeni te
SRAM aby se vse stihalo a stihala to i SRAM</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>delaji se totiz 2x2 veci:</FONT></DIV>
<DIV><FONT face=Arial size=2>- cte se z ram pro VGA</FONT></DIV>
<DIV><FONT face=Arial size=2>- maze se snimek kam se bude priste
kreslit (tyto dve operace se dalaji na stejne adrese, jen v
hornich/dolnich 8 bitech)</FONT></DIV>
<DIV><FONT face=Arial size=2>- cte se obsah na adrese podle AD </FONT></DIV>
<DIV><FONT face=Arial size=2>- zapisuje se podle AD (cteni je nutne z duvodu
toho ze pro pixel se pouziva vzdy jen polovina byte)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>640x480 ma pixelclock 25MHz, </FONT><FONT
face=Arial size=2>800x600 ma uz pixelclock 36MHz</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>neporadi nekdo jak obsluhovat tu SRAM? zdrojak
ve VHDL muzu klidne prilozit</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Pavel</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
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