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<H2><A NAME="s21">21.</A> <A HREF="Text-Terminal-HOWTO.html#toc21">$BIUO?(B C: EIA-232 (RS-232) $B$N%7%j%"%kDL?.(B</A>  </H2>

<H2><A NAME="ss21.1">21.1</A> <A HREF="Text-Terminal-HOWTO.html#toc21.1">$B%$%s%H%m(B</A>
</H2>

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<P>UART (Universal Asynchronous Receiver-Transmitter $BHFMQHsF14|Aw<u?.4o(B) 
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<H2><A NAME="ss21.2">21.2</A> <A HREF="Text-Terminal-HOWTO.html#toc21.2">$BEE05(B</A>
</H2>

<H3>$B%S%C%H(B 1 $B$D$rI=$9EE05(B</H3>

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$B%s%T%e!<%?$N(B EIA-422 $B%]!<%H$r(B EIA-232 ($BFC<l$J%1!<%V%k$,I,MW(B) $B$d(B EIA-42
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<H3><A NAME="byte_seq"></A> $B%P%$%H%G!<%?$rI=$9EE05%7!<%1%s%9(B</H3>

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<H2><A NAME="parity_def"></A> <A NAME="ss21.3">21.3</A> <A HREF="Text-Terminal-HOWTO.html#toc21.3">$B%Q%j%F%#8!::(B </A>
</H2>

<P>$BJ8;z$OIaDL!"(B7 $B%S%C%H$^$?$O(B 8 $B%S%C%H(B ($B$N%G!<%?(B) $B$GAw?.$5$l$^$9!#$3$l$K(B
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<H2><A NAME="ss21.4">21.4</A> <A HREF="Text-Terminal-HOWTO.html#toc21.4">$B%P%$%H%G!<%?$N9=@.(B ($B%U%l!<%`J,3d(B)</A>
</H2>

<P>EIA-232 $B%]!<%H$r;H$C$?%P%$%H%G!<%?$N%7%j%"%kEAAw$G$O!">o$K2<0L%S%C%H$+(B
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<H2><A NAME="ss21.5">21.5</A> <A HREF="Text-Terminal-HOWTO.html#toc21.5">EIA-232 $B$N@)8B(B</A>
</H2>

<H3>$BDcB.$GC;5wN%(B</H3>

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<P>1969 $BG/$K5,Dj$5$l$?(B RS-232 $B$O!"(B100 $BG\0J>e$NB.$5$GDL?.2DG=$J%D%$%9%F%C(B
$B%I%Z%"5;=Q$r;H$($J$$$N$G>/!9DK$^$7$$$b$N$G$"$k$H$$$($^$9!#%D%$%9%F%C%I(B
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<H3><A NAME="non_232"></A> EIA-232 $B$X$N7Q>5(B </H3>

<P>$B%D%$%9%F%C%I%Z%"(B ($BJ?9U7?(B) $B5;=Q$r;H$C$?9bB.$GD95wN%DL?.$N$?$a$N(B EIA $B5,(B
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<P>$BM#0l$NNc30$,(B Apple $B<R$N(B Mac $B%3%s%T%e!<%?$G!"Aw<u?.MQ$K%D%$%9%F%C%I%Z%"(B
($BJ?9U7?(B) $B$,;H$($k(B EIA-232/EIA-422 GeoPort $B$rAuHw$7$F$$$^$9!#>.$5$/$F(B
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$B$^$9$,!"%9%Z%C%/$K$O(B EIA-232 $B$h$j9bB.$@$H$&$?$C$F$$$^$9(B ($BHsJ?9U%$%s%?(B
$B%U%'!<%9$K$h$kD9;~4V$NF0:n$KBP$7$F$OL5J]>Z$G$9(B)$B!#(B</P>
<P>EIA-485 $B$b$^$?J?9U7?$G$"$j!"(Bethernet $B$d(B USB $B$J$I$N$h$&$J(B ``$B%P%9(B'' $B$H$7(B
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<P>2 Mbits/s $B$GF0:n$9$k(B EIA-530-A ($BJ?9U7?$G$9$,!"HsJ?9U7?$H$7$F$b;H$($^(B
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<H3>$B%i%$%s%I%i%$%P(B</H3>

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<H2><A NAME="sync"></A> <A NAME="ss21.6">21.6</A> <A HREF="Text-Terminal-HOWTO.html#toc21.6">$BF1D4$5$;$k$3$H$HF14|(B </A>
</H2>

<H3>$B$I$N$h$&$K$7$F(B ``$BHsF14|(B'' $B$rF14|$5$;$k$+(B</H3>

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$B$9$,!"(BPC $B$,;H$&(B UART$B!"Nc$($P(B 16450, 16550A, $B$"$k$$$O(B 16650 $B$OF14|$r%5(B
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$BLn$O%K%C%A!<%^!<%1%C%H$J$N$G!"@=IJ$O$H$F$b9b2A$G$9!#(B</P>
<P>EIA-232 $B$NF14|ItJ,0J30$K$b!"(BEIA $B$K$OF14|$K4X$9$k5,Dj$,3F<o$"$j$^$9!#(B E
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$B$"$j!"F14|%b%G%`(B ($B$^$?$O(B``$BF14|%b%G%`%(%j%_%M!<%?(B'' $B$H8F$V%?%$%_%s%0?.(B
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$B%Q%1%C%H$K5M$a9~$`$N$G$9!#(B</P>

<H2><A NAME="block"></A> <A NAME="ss21.7">21.7</A> <A HREF="Text-Terminal-HOWTO.html#toc21.7">$B%V%m%C%/%b!<%I(B </A>
</H2>

<H3>$B$O$8$a$K(B</H3>

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<H3>$B%V%m%C%/%b!<%I!"%U%)!<%`$N<oN`(B</H3>

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<H2><A NAME="RS232_books"></A> <A NAME="ss21.8">21.8</A> <A HREF="Text-Terminal-HOWTO.html#toc21.8">EIA-232 (RS-232) $B4XO"=q@R(B </A>
</H2>

<P>($BCm(B : $B:G=i$NK\$O(B EIA-232 $B$h$j9-HO$JJ,Ln$r%+%P!<$7$F$$$^$9(B) 
<UL>
<LI> Black, Uyless D.: Physical Layer Interfaces &amp; Protocols, IEEE
Computer Society Press, Los Alamitos, CA, 1996.</LI>
<LI> Campbell, Joe: The RS-232 Solution, 2nd ed., Sybex, 1982.</LI>
<LI> Putnam, Byron W.: RS-232 Simplified, Prentice Hall, 1987.</LI>
<LI> Seyer, Martin D.: RS-232 Made Easy, 2nd ed., Prentice Hall,
1991.</LI>
</UL>
</P>

<H2><A NAME="ss21.9">21.9</A> <A HREF="Text-Terminal-HOWTO.html#toc21.9">$B%7%j%"%k%=%U%H%&%'%"(B</A>
</H2>

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