XR68C681 データシートの表示（PDF） - Exar Corporation

部品番号

コンポーネント説明

メーカー

XR68C681

CMOS Dual Channel UART(DUART)

Exar Corporation 

XR68C681

PIN DESCRIPTION (CONT’D)

Pin Number

(44 pin PLCC)

Pin Number

(40 pin DIP)

11

1

1=

16

1

1/

1

1@

11

1<

1=

1

16

=

1/

=

1@

Symbol

Type Description

5

8

5

5.
:7

5

22



#,


.D25

5
*

#
7

 Transmitter Serial Data Output.
    % %(-(+

(' ( (% %($ +(%  (%  (% $ (   3(-

 (-  %     %( (% ($" $(%$"  (-

(   ' :,*
7 $ #+ ! ''3 (% %'(+($"

  %($ $ (% % (+$  +    %(  (+

-(%    +(- $- +   ''3

No Connect.

# Receiver Serial Data Input.
    % %(-(+('

( (% '($ +(% #+  ! '( ''3 (% %'(+($"

  '($ $ (% %$    (%(- $- +   ''3

#  

Crystal Output or External Clock Input.  (% ( (%   '

'( +  %($ +   '&% $  ''(  -$

    ( %'( (% %$ #+   %'( (%  %$"

 ! ''3 %(- %  %($   (% (

# $ +   5/<
/< $('  +'( &"   %

% %&  %(- ( +C'(%   9G $

= 9G  (% C( '   & (   '&% %'(

  &   ! :'( ''3 %(-

# Crystal Input.
'( +  %($ +   '&% %(

+ 5.
:7 #+   %'( (% %$"  ''( % % 

''$ +  (% (  -$  (% ( %  +  (+

 ! ''3 (% %($  5.
:7

# Master Reset.    (% ( '% ( -(%% "

*" #" #" ," ,
" ((((G%   #;   /" %%

 
.(" '%     (%" ,  ,@ (

  -(' H (- I %" $ '%  %( ' % (  

('( % (   5 $ 5*  3(-  (- 

# Chip Select. '(    $ % (%  %$  

 (% (-  %+%   
, $    ( 

 @  $  
 (% 

# Input 2. 0 % (  (% ( ' %  '+(-

$  
. ! ''3 ("    '  * '(

'3 # 5
*

# Interrupt Acknowledge. '( :  (% ( (%  
,.%

%%    ( C% (%%$ &    $('

A   
, %%%  (% (" ( ($('%     .%

( C% (%    %('$" $     & !

% '&' (   ( '3$- '&'   

( %$   
,.% ( '3$- & '(-  

'% +   # ;' -(% #;    $ %

  @

 

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