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XR68C681J-F Datasheet, PDF (37/75 Pages) Exar Corporation – CMOS Dual Channel UART(DUART) | |||
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XR68C681
Input
Port
#,
#,
#,
#,1
#,=
#,6
Alternate Function(s)
4
$ (
+ '
84 (% (
(%
'( :" + +
'(
*4
$ (
+ '
*
84 (% (
(%
'( : + +
'(
D254
.( 2!
'3 #
5*4 2!
'3 (
+ '( '
*
5
4 2!
'3 (
+
%( '
5
4 2!
'3 (
+ '( '
5*4 2!
'3 (
+
%( '
*
Approach to Program Alternate Functions
#, '
-$ +
'(
%
(
& %(
-
M=N J $($ $(%'%%(
(% +
'(
" % % Section G.3
#, '
-$ +
'(
% * (
& %(
- *M=N J $($ $(%'%%(
(% +
'(
" % % Section G.3
#, '
-$ +
'(
% !
''3 (
+
.( & %(
-
M/4=N J
M" " N $($ $(%'%%(
(
++'
+ (% '(
% % Section D.2
#, '
% -$ +
'(
% !
''3 (
+ '( + '
* & %(
-
*M@4=N J M" " " N + /5 '3" *M@4=N
J M" " " N + 5 '3
#,1 '
-$ +
'(
% !
''3 (
+
%( + '
& %(
-
M14N J M" " " N + /5 '3"
M14N
J M" " " N + 5 '3
#,= '
-$ +
'(
% !
''3 (
+ '( + '
& %(
-
M@4=N J M" " " N + /5 '3"
M@4=N
J M" " " N + 5 '3
#,6 '
-$ +
'(
% !
''3 (
+
%( + '
* & %(
-
*M14N J M" " " N + /5 '3" *M14N
J M" " " N + 5 '3
Table 12. Listing of Alternate Function for the Input Port Pins
E.2 Input Port Configuration Registers (IPCR)
#
,
+(-(
-(% (% H$
&I
-(% %% +(
- +
'(
%4
% 3
(' + + (
(
% 4
#, #,1" % '
-$ -(' %" %(
' % $
+ (% -(%
% 3
'
-(' % + %
+ (
(
%
%C
&" #
,
+(-(
-(% (%
+
'(
& $(($ (
%'(
%4
*(% @ =4 H
- (
:-(' I #$
(+('(
(%
*(% 1 4 '
% + #
,(
% #, #,1
( + + #
,
+(-(
-(% (%
%
$ (
Table 13.
Bit 7
#,1
J 8
J E%
Bit 6
#,
J 8
J E%
Bit 5
#,
J 8
J E%
Bit 4
#,
J 8
J E%
Bit 3
#,1
J :
J 9(-
Bit 2
#,
J :
J 9(-
Bit 1
#,
J :
J 9(-
Table 13. Bit Format of the Input Port Configuration Register (IPCR)
(+ $(%'%%(
+ ' (+($" ( (
(% -(% +%
Bit 0
#,
J :
J 9(-
1@
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