XR88C681CP Datasheet, PDF (16/99 Pages) Exar Corporation – CMOS DUAL CHANNEL UART (DUART)

XR88C681
Bit 7








Bit 6








Bit 5








Bit 4








Description
Reset Error Status.
%   '($ *3
*" ,(& 2 ,2" ( - 2  2  $
 2 2 %% (%" N>41O
'(+('&" (+   2 $" +  (' '  
 (% %  C*'3D 2 $"  (% ' $ (
%  +   '( 2 # $('% (   %
-(% #   *'3 2 $"  ' (   ,2"
2" 2"  * ''%"    ( ' (   
+--$ (   % -(%"  (  (% ' $ (%
(%%$
#+   2 $" +  (' '   (% % 
C
' 2 $D"     '  % +  
% -(% + ,2" 2"  $ *  +'$ 
 ' ' & ' ' %(% #   C
'
2 $D"   % +  % ( $('% (% %$
 &    ' '   (%     +   8
  2 ( $(' (% &% % $ %  C*'3
2 $D ( $('"  $ E(%  (% ' $ 
 %
Reset Break Change Interrupt.
%   '  
H% 3 '  - (  %% (
Start Break. '%   5    
 %( %   $  %  3 #+  
 %( (% &"   % +   3 & 
$&$    ( (% #+    %( (% '
("   3 -( %      %(%%( +
 % ' '% (   8 (% '$" (I"
52, %   +   3 ( -( 
Stop Break.   5 (  ( - (- ( ( 
( (% 5 ( ( (- +   ( ( 
+   ! ' '" (+  &" (%  %($
Set Rx BRG Select Extend Bit. %   '  H%
C'( *0 ' 2! $ *(D  
Clear Rx BRG Select Extend Bit.
%   '  
H% C'( *0 ' 2! $ *(D  
Set Tx BRG Select Extend Bit. %   '  H%
C %( *0 ' 2! $ *(D  
Clear Tx BRG Select Extend Bit.
%   '  
H% C %( *0 ' 2! $ *(D  
Table 3. Miscellaneous Commands, Upper Nibble of all Command Registers,
Unless Otherwise Specified (Cont’d)
 
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