XR82C684CJ-F Datasheet, PDF (52/107 Pages) Exar Corporation – CMOS Quad Channel UART(QUART)

XR82C684

<=
$:



!  !B

<=



!5:
!

E

$

$E

!-
$:
<5
8288 Bus Controller
!0  !9
!



74LS373
8086 CPU
:-8
!



74LS373
Figure 26. Schematic of the 8086 CPU Mode (Max Mode)
5
5E
$
$E
!  !B
  B
!0  !9
0  9
8086 • C Interrupt Processing
$*  (  '    I(% (  %(' * 
 
+ # ( 3( %%  
+ K% $: (  &  ,,( , (
(,   '  
+ % '  (% ' 
( %'( # ( 3( %%   $: ( (* ( , (  
/( 1    %   # #    ( %  /1 % 
$ (  '%#   $
= (  *   (  3( 
%%  '  (%  %#   ( ( , ( 
(% "'  '  /(  ' 1 & !  !B
*    %   00.• + 3(   (%   
(&  (%  &    @ (   ( 
   '( *   (  %('  (  (  &
( '  (% /(  ' 1 (% 0 (% 3(#   00.• + '
''     9. (**  (  ' %  
99 (( &# %( ' ' '  (% (( & /@1#
  % (% "'  %   *(% = & *  &
*    $  ('  ( %-A 
Figure 27 % %  %' (' *   80
.0@
  ( *'( ,   /( 1   00.
+ ('
Please note that the QUART has been configured to
operate in the Z-Mode. Therefore, the user must account
for the IEI input to the QUART device.
 
9