XR82C684CJ-F View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XR82C684CJ-F

CMOS Quad Channel UART (QUART)

Exar Corporation 

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XR82C684

Port 2 (P2.0 - P2.7)

+   +(%   0 (%   %     '

*'( % ,  % $-#  %   (, & *  

%% % *  %(,% 3( " '   & *

    9. &% * "   & 0  9

Port 3:

+  4 (%   %   (%   B $ (( 

*'( (, % ,  % $-#  % (% 

( *'( % 5' *  % (%   

 %# % (% ( Table 5#  37

-INT0 (P3.2) and -INT1 (P3.3)

$:  $:  " ( I% (% 

  09•
 5' *  % ( (% %  /('

(1  '%%(, $  (% '%#    /('1

%   (*  *  % (%  %%#  

 , '   3(  ('& '   %'(*('

*("  '( ( '   &  (%  '( (%

( &   '('( %(, *   09•
$


'   ' , Table 6 %%    '( (

'   &      , '   3( '  # (*

(  *  % (%  %%

Bit

+4

+4

+4

+44

+4@

+49

+4.

+4B

Name

8!

8!

$:

$:





E

!

Alternate Function

'( ! *  ( + 

%( ! *  ( + 

5" $ 

5" $ 

(-
  5" $

(-
  5" $

5" !  & E(  

5" !  &   

Table 5. Alternate Functions of Port 3 Pins

  09 % %  % ((  (% 3 (' 

  (*'(,    80
.0@    

( %  % (% 7

ALE - Address Latch Enable

$* +   (% % ( (%     %    % 

   3 & *   %% %  <5 (%   %(,  

' %   %% (  " ,(% (,  

*(% * *   & '&' '  (% (%  #   +  

(%    ( *   (   (,  

%'  * *    & '&'# 3     %*

6% '

Interrupt

$:

$:

Location

4;

4;

Table 6. Interrupt Service Routine Locations (in

Code Memory) for -INT0 and -INT1

 * # (*   % (% %(, (   *  % (% %

 ( I% (#     % % (%  

   ( ( %('  (  

' ((  ' (%'(    ( %('

 ( (%  '   *  % %%  '( %

$*   09•
(% I(  (*'  "

'  % (     & %' * %(J% ,

  9. &%#     + %   +   %  %

%   %%   (% +   3( *'( % 

(" %%- % !(,   *(% * * 

 & '&'# +   3(  %    3 %%

& !(,   %'  * *    & '&' +  

3(  %   (('(   % +   3( 

% %    %% & <5    % * 

B@<4B4 % ' (' '  % 

("   %%  ! % %(,%

Figure 9 (%  %' (' (%(, 3   80
.0@

 '  (*'    09•


 

4

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