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XR68C681J-F Datasheet, PDF (13/75 Pages) Exar Corporation – CMOS Dual Channel UART(DUART)
XR68C681
Address
(HEX)

Read Mode Registers
Register Name
Symbol
$  -(% " '  
 " 

%  -(% " '  

%3 $ #   %
 -(% 
1
! 9$( -  -(% "
'  
=
#  ,   -
 -(% 
6
#   %  -(% 
/
  .(   
*&  -(% 
@
  .(  : 
*&  -(% 
<
$  -(% " '   *

%  -(% " '  
*

22;2

#
9
#,
#

:
*" *
*
*
! 9$( -  -(% "
'   *

#   ; '  -(% 

#  ,
9*
#;
#,
2
   .( 
 $

   .( 
 $


Write Mode Registers
Register Name
Symbol
$  -(% "
'  
'3   '  -(% "
'  
 $  -(% "
'  
! 9$( -  -(% "
'  
!((&    -(% 
 " 


9

#   %3  -(% 
  .(   
*&  -(% 
  .(  : 
*&  -(% 
$  -(% " '   *
'3   '  -(% "
'   *
 $  -(% "
'   *
! 9$( -  -(% "
'   *
#   ; '  -(% 
 ,  +(-(
 -(%  ,  ,@
   , *(%
 $
   , *(% 
 $
#

:
*" *
*
*
9*
#;
,
,*
,*
Table 1. DUART Port And Register Addressing
Note:
The shaded blocks are not Read/Write registers but rather, “Address-Triggered” Commands.
  
1