XR88C681N(1999) Просмотр технического описания (PDF) - Exar Corporation

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Компоненты Описание

Список матч

XR88C681N
(Rev.:1999)

CMOS Dual Channel UART (DUART)

Exar Corporation 

XR88C681

PIN DESCRIPTION

44 PLCC/

LCC





40 DIP,

CDP



1



<

1

6

<

/

6

>

/

=

>



=











1



28 DIP,

CDIP





1

<

6

/

>

=

Symbol Type Description

7

No Connection.



# LSB of Address Input.  (% (" - ( $$%% #%"

  1  %$  %' '( -(%% ( (   

$('" $(- 2 $ B#2 (% (  
,

#,1

# Input Port 3. 0 ,% #  B     (%

5
 #

(- (   #$"  (% ( ' %  %$ %  

5
 ?

! ''3 ( +  
 %( 5




#,


*



1

#,




B



5*

7

5*

B     (% (- (   ?$"  (% ( '

 %$ %   ! ''3 ( +  
 '(

 5


# Address Input.

# Input Port 1. 0 ,% #   (% ( ' % 

%$ %   '( 9" C
 *
  $D (


*

# Address Input.

# MSB of Address Input.  (% (" - ( $$%% #

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

 $('" $(- 2 $ B#2 (% (  

,

# Input 0. 0 ,% #   (% ( ' %  %$

%   '(" C

$D ( 


# Write Strobe (Active-Low). CD   (% (  ( 
 (%

% CD (%   '% +    *% (   $

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

  (%(- $- + B

# Read Strobe (Active Low). CD   (% (  ( 
 (%

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

"    $ %

# Receive Serial Data Input (Channel B).   % %(-(+('

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

5
*" (% %'(+($"   $ (% %$    (%(- $- +

 (% ''3

No Connect.

 Transmitter Serial Data Output (Channel B).   % %(-

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

$ (   (- 3(- %     %( (% ($"

$(%$"      '  (% (- (   ' 9,

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

5
*"   %($ $ (% % (+$  +    %

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

 

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