XR88C681CP Datasheet, PDF (23/99 Pages) Exar Corporation – CMOS DUAL CHANNEL UART (DUART)

XR88C681
C.6.1.1 8051 Microcontroller
  =6 +(& + ('' % (%  +'$ & #   $ '% (  (& +  ((%  +  %
 ((% ( '$4
  ' ( %( 
  = ( #.  ,  ,1
  / ( (%
 <3 &% + 
 = &% +  
Figure 3 % %  '3 $(- +   =6 ('' "  $ Figure 4 % %   (  +  (% $('
# 

 
#7
#7
(  =1.=6
( 
( 
( ,
= &%
 
=1.=6
 
-(%%
= &%
 

:  =1.=1
<:  =6
=:  =6
( 
=1.=6
( 
( 
25




,
%'(
*%
 
#. ,%
( ,
2

92
,27
,  , ,
,1
5 5
Figure 3. Block Diagram of the 8051 Microcontroller
 
1