XR82C684CJ-F Datasheet, PDF (19/107 Pages) Exar Corporation – CMOS Quad Channel UART(QUART)

XR82C684
Bit 7










Bit 6










Bit 5










Bit 4










Description
Start Break:  '%   8!   3    %( %     %
 6 $*    %( (% &#   % *   6 &  &   3
( (% $*    %( (% '(#   6 ,( % 3     %(%%( *
 % ' '% (   ; (% ' # (J# 85+ %   *   
6 3( ,( 
Stop Break:   8! (  3( , (, 3( ( 3 ( (% 8! 3( ( (,
*   ( ( *    " ' '# (*  &# (%  %(
Set Rx BRG Select Extend Bit: %   '  K% /'( )2 ' 5" 
)(1  
Clear Rx BRG Select Extend Bit:
%   '  K% /'( )2 '
5"  )(1  
Set Tx BRG Select Extend Bit: %   '  K% / %( )2 '
5"  )(1  
Clear Tx BRG Select Extend Bit:
%   '  K% / %( )2 '
5"  )(1  
Set Standby Mode (Channel A): E   (% '   (% (  6 (  
 

  ,(%#  3 (%   *  ' *    %(%# '(%#
'  -(   ((  '('(%  '     (   % &    3
 3   Please note that this command effects the operation of the entire
chip. Normal operation is restored by a hardware reset or by invoking the “SET
ACTIVE MODE” command.
Reset IUS Latch (Channel B): E   (% '   (% (  6 (  
  )

  ,(%#       (% ( , ( ? # ( '%%   $ 
(' $  '   %  (%# (  # 3( '%   $5  
 ,, / (, 1
Select Direct System Clock (Channel C):
  3( ,  3 55#   (   (  6( ,  (% '  #     (%
( , (  /!(( &%
 '61   '(*('&#  (%  %     %'(
  ' '6 *I '& (% (( & 3 # (    ( ,     ,    
( *   (( ,
  ) '6 $*     % (   /!(( &%%

 '61  #       ' ( *   *  '  % 3(   * *
  %  ( Table 15   Table 15A $*   % (  6%  (% '   (  

 

  ,(%#    (% /!((&1 3 6 (%   *   
/(( , %(, 1  #     % 3( ' (    %# %'(*( ( Table 15
  Table 15A
Set Active Mode (Channel A): E   (% '   (% (  6 (  
  

  ,(%#     (%   *     &     %%
 ( 
Set Z-Mode (Channel B): E   (% '   (% (  6 (  
  )

  ,(%#     (% ' ((    (   ?     (
(%'%%( *    K% ( 3 ( (   ? # +% % Section
C.6.2 ( *  00   &
Select Divided System Clock (Channel C):
 (% '   (%   % *   /' !(' &%%
 '6  1 '  
 (% '   3(   /(( & 1 3 6 (    )2 (( , %(,   
  **' *  (% '   (%  '     &  * *   % 
( Table 15   Table 15A Please note that this command effects the baud rates
for all four channels of the QUART.
Reserved
Reserved
Table 2. Miscellaneous Commands, Upper Nibble of All Command Registers, Unless Otherwise Specified