<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML> <HEAD> <META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9"> <TITLE>Linux $B%O!<%I%&%'%"8_49@-(B HOWTO: I/O $B%3%s%H%m!<%i(B</TITLE> <LINK HREF="Hardware-HOWTO-11.html" REL=next> <LINK HREF="Hardware-HOWTO-9.html" REL=previous> <LINK HREF="Hardware-HOWTO.html#toc10" REL=contents> </HEAD> <BODY> <A HREF="Hardware-HOWTO-11.html">$B<!$N%Z!<%8(B</A> <A HREF="Hardware-HOWTO-9.html">$BA0$N%Z!<%8(B</A> <A HREF="Hardware-HOWTO.html#toc10">$BL\<!$X(B</A> <HR> <H2><A NAME="s10">10. I/O $B%3%s%H%m!<%i(B</A></H2> <P>$B%7%j%"%k!"%Q%i%l%k!"%8%g%$%9%F%#%C%/%]!<%H!"$"$k$$$O$3$l$i$,$^$H$a$FIU(B $B$$$F$$$k0lHLE*$J(B I/O $B%+!<%I$KBP1~$7$F$$$^$9!#(B Linux $B$O(B 8250, 16450, 16550, 16550A $B$H$$$&7?HV$N(B UART $B$KBP1~$7$F$$$^(B $B$9!#I8=`$G$J$$(B IRQ (9 $B$h$jBg$-$$?t(B) $B$KBP1~$7$F$$$k%+!<%I$G$b;H$($^$9!#(B <P>National Semiconductor $B<R$N!V(BApplication Note AN-493$B!W(B(Martin S.Michael $BCx(B) $B$r8+$F$/$@$5$$!#$3$N=qN`$N(B 5 $B>O$K(B NS16550 $B$H(B NS16550A $B$N0c$$$,>\$7$/@bL@$5$l$F$$$^$9!#$3$l$rMWLs$9$k$H!"(B National Semiconductor $B<R(B $B$N(B NS16550 $B$N(B FIFO $B2sO)$K$O%P%0$,$"$k$1$l$I!"(B NS16550A $B0J9_$N%A%C%W$G$O=$@5$5$l$F$$$k$H$$$&$3$H$G$9!#$?$@$7%P%0IU$-(B $B$N(B NS16550 $B$O$:$C$H@N$K>/$7=P2Y$5$l$?$@$1$J$N$G!"$3$N%A%C%W$K=P2q$&$3(B $B$H$O$^$:$J$$$G$7$g$&!#8=:_<B:]$K8+$+$1$k%\!<%I$G!V(B16550$B!W$,:\$C$F$$$k$b$N(B $B$NB?$/$O8_49IJ$N%a!<%+!<$,=P$7$F$$$k$b$N$G!"(BNational Semiconductor $B<R(B $B$,IU$1$F$$$k!V(BA$B!W$H$$$&E:;z$rIU$1$F$$$J$$$@$1$G$9!#$^$?!"%^%k%A%]!<%H(B $B%\!<%I$NCf$K$O(B 16552 $B$d(B 16554$B!"$"$k$$$O(B National Semiconductor $B<R$dB>(B $B$N%a!<%+!<$,=P$7$F$$$kJL$N%^%k%A%]!<%HMQ%A%C%W$d%^%k%A%U%!%s%/%7%g%s%A%C%W(B $B$r;H$C$F$$$k$b$N$b$"$j$^$9(B($B0lHLE*$K$O$3$l$i$NB?$/$O%\!<%I$KH>EDIU$1$5(B $B$l$F$*$j!"(B40 $B%T%s$N(B DIP $B$G$O$"$j$^$;$s(B)$B!#(B $BBgDq$N>l9g$O!"Hs>o$K8E$$(B 40 $B%T%s(B DIP $B<0$N(B National Semiconductor $B=c@5!V(BNS16550$B!W(B(A $BL5$7(B)$B%A%C%W$K=P2q$o$J$$8B$j$O(B $B5$$K$9$k$3$H$O2?$b$"$j$^$;$s!#(B $B$3$N%A%C%W$K=P2q$C$?>l9g$K$O!"(B16550A $B$G$O$J$/(B(FIFO $B$r;}$C$F$$$J$$(B) 16450 $B$H$7$F07$$$^$7$g$&!#(B $B!=!=(B Zhahai Stewart <<CODE> <A HREF="mailto:zstewart@hisys.com">zstewart@hisys.com</A></CODE>> <P> <HR> <A HREF="Hardware-HOWTO-11.html">$B<!$N%Z!<%8(B</A> <A HREF="Hardware-HOWTO-9.html">$BA0$N%Z!<%8(B</A> <A HREF="Hardware-HOWTO.html#toc10">$BL\<!$X(B</A> </BODY> </HTML>
