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 $BKY@n$G$9!#(B

> $B%P%9$OJ*M}E*$K$O(B 2 $B$D$N%"%/%F%#%V%o%$%d!<$H%0%i%s%I$X$N@\B3$+$i9=@.$5$l$^$9!#(B
                                   $B%o%$%d(B
> $B%"%/%F%#%V%o%$%d!<$G$"$k(B SDA $B$H(B SCL $B$O$I$A$i$bAPJ}8~$N$b$N$G$9!#(B
            $B%o%$%d(B

> SDA $B$O(B $B%7%j%"%k%G!<%?%i%$%s$G$"$j!"(BSCL $B$O%7%j%"%k%/%m%C%/%i%$%s$G$9!#(B
> 
> $B%P%9$K@\B3$5$l$kA4$F$N%3%s%]!<%M%s%H$O!"(B
> $B$=$l$,(B CPU$B!"(BLCD $B%I%i%$%P!"%a%b%j$b$7$/$OJ#;($J5!G=$r;}$C$?%A%C%W$G$"$l$P!"(B
> $B%f%K!<%/$J%"%I%l%9$r;}$A$^$9!#(B


> $B%=%U%H%&%'%"%$%s%?%U%'!<%9$O!"(B
> $BDL>o$O(B 2 $B$D$NDq93$K$h$C$F2s$5$l$?(B 2 $BK\$N?.9f@~$+$i$J$k(B
> $BHs>o$KC1=c$J%O!<%I%&%'%"$K$N$_0MB8$7$F$$$^$9!#(B
 $B!V2s$5$l$k!W$H$$$&$N$,$h$/J,$+$i$J$+$C$?$G$9!#(B
 $B86J8(B Software interfaces rely on very simple hardware, usually two
lines twiddled by 2 registers.

 jargon $B$N(B 3. $B$N0UL#$@$H;W$&$N$G$9$,!"$3$3$G$O!V6nF0!W$J$I$H$7$?J}$,NI(B
$B$$$N$G$7$g$&$+!)(B

:twiddle: /n./ 1. Tilde (ASCII 1111110, `~').  Also called [$BN,(B]
   3. /vt./ To change something in a small way.  Bits, for example,
are
   often twiddled.  Twiddling a switch or knob implies much less sense
   of purpose than toggling or tweaking it; see {frobnicate}.  To
   speak of twiddling a bit connotes aimlessness, and at best doesn't
   specify what you're doing to the bit; `toggling a bit' has a more
   specific meaning (see {bit twiddling}, {toggle}).

                           
> .Bl -column "$B%$%s%?%U%'!<%9(B" -compact
> .It Em $B%$%s%?%U%'!<%9(B Ta Em $B@bL@(B
> .It Sy pcf Ta "$B%U%#%j%C%W%9(B PCF8584 $B%^%9%?!?%9%l!<%V%$%s%?%U%'!<%9(B"
                 Philips
 $BA0=P$,(B Philips semiconductors $B$J$N$G$3$3$b(B Philips $B$GNI$$$H;W$$$^$9!#(B
--
$BKY@nOBM:(B
