XR88C681CP Datasheet, PDF (42/99 Pages) Exar Corporation – CMOS DUAL CHANNEL UART (DUART)

XR88C681

'3 ( 
07
A6;
,8#
  6
  >
#7
7#
B #
*)
8 9
 8
* :
B

2)
#)

22
Figure 18. Schematic of Z-80 CPU Module
2B
2
#B
#
#7
Z-80 CPU Interrupt Servicing Capability
  ?=
, ' ( %  (  E% ( %4 7#
 $ #7 7# (%   C7 %3D (  E%
(  ( L  $ #7 (%   C%3D (  E%
(  (     %3 + ( +'( -     "  
 & ' ' $ (   #7 ( 
  ?=
, '  ' +(-$   (   +
  $(++  (  $%4
 2!  ;'$
 ('
 C,( D ;'$
2' +  % (  $% %   #7 ( +   ?=

,  $ (  $(%'%%$ (   +( - %'( %
External Vectored Interrupt Processing (Interrupt
Mode 0)
  ?= • , (  (  (% (  $ (+   C# D
( %'( %  !'$ B     #7 ( (%
%%$ &  (  $(' E%( -  ( "
 
, ( ' (% '  ( %'(  +
'( +  (% ( %'( "  
, $ ( %%
#7 -- CD #7 (%   '( C# 
'3 $-D %(-     
, $ % (
$  ( ((   '%% + (  %('( - B 
  ?=
, % (   #  $ " ( (%
 
<