Interface 5V CPU na 3.3V SPI memoriju

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" colspan=2 height=80 BGCOLOR="#777777" TEXT="#080000" bgproperties="fixed" background="5f200500enpprp.gif"> <div> <A HREF="index.htm" TARGET="_top" TITLE="SPER Servis profesionalne elektronike Ra"><U><B>home</B></U></A><B>     |     </B><FONT SIZE="4" COLOR="#FFCC66" FACE="Trebuchet MS" ><B>SPER Servis profesionalne elektronike Rajak</B></FONT></div> <div> <A HREF="podsklopovi.htm" TARGET="_top" TITLE="Podsklopovi"><U><B>Podsklopovi</B></U></A></div> <script defer src="respons.js"></script><P></P> </td> </tr><tr> <td valign="top" width=210 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> Interface 5V CPU na 3.3V SPI memoriju</div> <bR> <div> <A HREF="karta.htm" TARGET="_top" TITLE="karta"><U><B><IMG SRC="04fa3260.gif" border=0 width="163" height="38" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></U></A></div> <bR> <div> <A HREF="podsklopovi.htm" TARGET="_top" TITLE="Podsklopovi"><U><B>go back</B></U></A></div>  <form method="get" action="http://www.google.hr/custom" target="google_window"> <table border="0" bgcolor="#99cc99"> <tr><td nowrap="nowrap" valign="top" align="left" height="32"> <bR> <br/> <input type="hidden" name="domains" value="www.sper.hr"></input> <label for="sbi" style="display: none">Unesite Vaše uvjete za pretraivanje</label> <input type="text" name="q" size="20" maxlength="255" value="" id="sbi"></input> </td></tr> <tr> <td nowrap="nowrap"> <table> <tr> <td> <input type="radio" name="sitesearch" value="" id="ss0"></input> <label for="ss0" title="Pretrai Web"><font size="-1" color="black">Web</font></label></td> <td> <input type="radio" name="sitesearch" value="www.sper.hr" checked id="ss1"></input> <label for="ss1" title="Trai www.sper.hr"><font size="-1" color="black">www.sper.hr</font></label></td> </tr> </table> <label for="sbb" style="display: none">Pošaljite obrazac za pretraivanje</label> <input type="submit" name="sa" value="Google pretraga" id="sbb"></input> <input type="hidden" name="client" value="pub-2650537455752702"></input> <input type="hidden" name="forid" value="1"></input> <input type="hidden" name="ie" value="ISO-8859-2"></input> <input type="hidden" name="oe" value="ISO-8859-2"></input> <input type="hidden" name="cof" value="GALT:#800080;GL:1;DIV:#37352E;VLC:99C9FF;AH:center;BGC:FFFFFF;LBGC:CAF99B;ALC:CC0000;LC:CC0000;T:44423A;GFNT:0066CC;GIMP:0066CC;LH:38;LW:163;L:http://www.sper.hr/logo.gif;S:http://;FORID:1"></input> <input type="hidden" name="hl" value="hr"></input> </td></tr></table> </form>  <bR> <div> <A HREF="bistabil_dugo_kratko.htm" TARGET="_top" TITLE="Dugo kratko bistabil"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Dugo kratko bistabil</B></U></A></div> <div> <A HREF="mikroprocesorski_autoreset.htm" TARGET="_top" TITLE="Autoreset"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Autoreset</B></U></A></div> <div> <A HREF="elektronicki_osigurac_za_dc_napon.htm" TARGET="_top" TITLE="Elektroniki osigura"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Elektronički osigurač</B></U></A></div> <div> <A HREF="univerzalni_pickup_interface.htm" TARGET="_top" TITLE="Pickup interface"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Pickup interface</B></U></A></div> <div> <A HREF="telefonski_preklapac.htm" TARGET="_top" TITLE="Telefonski preklapa"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Telefonski preklapač</B></U></A></div> <div> <A HREF="mostni_driver_12v.htm" TARGET="_top" TITLE="Mosni driver 12V"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Mosni driver 12V</B></U></A></div> <div> <A HREF="pilasti_generator.htm" TARGET="_top" TITLE="Generator pilastog napona"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Generator pilastog napona</B></U></A></div> <div> <A HREF="mosfet_predregulator.htm" TARGET="_top" TITLE="Mosfet predregulator"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Mosfet predregulator</B></U></A></div> <div> <A HREF="on_off_automatika_za_tastere.htm" TARGET="_top" TITLE="Onoff sklop"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">On-off sklop</B></U></A></div> <div> <A HREF="uc3842_sinkronizacija.htm" TARGET="_top" TITLE="Sinkronizacija UC3842/43"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Sinkronizacija UC3842/43</B></U></A></div> <div> <A HREF="zastita_polariteta.htm" TARGET="_top" TITLE="Zatita od pogrenog polariteta"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Zaštita od pogrešnog polariteta</B></U></A></div> <div> <A HREF="12v_termostat.htm" TARGET="_top" TITLE="Precizni termostat za 12V ventilator"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Precizni termostat za 12V ventilator</B></U></A></div> <div> <A HREF="24v_pumpa.htm" TARGET="_top" TITLE="Napajanje 24V/20mA"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Napajanje 24V/20mA</B></U></A></div> <div> <A HREF="senzor_vode_sa_elektrodama.htm" TARGET="_top" TITLE="Senzor vode"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Senzor vode</B></U></A></div> <div> <A HREF="fotocelija.htm" TARGET="_top" TITLE="Optiki IC senzor"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Optički IC senzor</B></U></A></div> <div> <A HREF="repetativni_timer_5_sekundi.htm" TARGET="_top" TITLE="Timer 5 sekundi"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Timer 5 sekundi</B></U></A></div> <div> <A HREF="low_drop_stabilizator_12v.htm" TARGET="_top" TITLE="Low drop stabilizator"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Low drop stabilizator</B></U></A></div> <div> <A HREF="rms_mjerni_pretvarac.htm" TARGET="_top" TITLE="RMS pretvara"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">RMS pretvarač</B></U></A></div> <div> <A HREF="logaritamski_mjerac_svjetla.htm" TARGET="_top" TITLE="Mjera komparator svijetla"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Mjerač - komparator svijetla</B></U></A></div> <div> <A HREF="vco_sa_555.htm" TARGET="_top" TITLE="Jednostavni VCO"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Jednostavni VCO</B></U></A></div> <div> <A HREF="rs232_opto_interface.htm" TARGET="_top" TITLE="Opto RS232 9600bps"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Opto RS232 9600bps</B></U></A></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Interface 5V CPU na 3.3V SPI memoriju</B></div> <div> <A HREF="lcd_dvm_napajanje.htm" TARGET="_top" TITLE="Izolirano napajanje za LCD DVM"><U><B><IMG BORDER="0" SRC="Symb075c00b700f0ff000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Izolirano napajanje za LCD DVM</B></U></A></div> <bR> </td> <td valign="top" height=400 BGCOLOR="#FFFFFF" TEXT="#080000"> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-2650537455752702" crossorigin="anonymous"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-2650537455752702" data-ad-slot="7117608876" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> <bR> <bR> <div> <B><IMG SRC="91c56760.gif" border=0 width="598" height="374" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <bR> <div>       Prikazani sklop riješava povezivanje 3.3V SPI memorije sa 5V mikrokontrolerom. Kao translator nivoa izlaznih signala se koristi 74HC4053, a za ulazni signal 74HCT14. Oba čipa se napajaju sa 5V. Napajanje 3.3V za memoriju je riješeno sa diskretnim stabilizatorom sa TL431.</div> <bR> <div>      Sklop se može reducirati za jedan inverter (74HCT14-pin 3 i 4), ali tada treba voditi računa da će signal <B>DO</B> sa memorije biti invertiran.</div> </td> </tr></table></body>