XR68C681 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XR68C681' PDF : 75 Pages View PDF
XR68C681
I. PROGRAMMING
( + (% - $ & ((- '
$% ( ( -(% %" ( (
+ $'3 (% ($ $ & %% -(% % (' '
$ & , -(% $$ %%(- (% % (
Table 1 $ % ' % ' % + "
#" #" ," $ , -(% % $ ((((G %
#; / (- ( " ' % $ ! '(% $ (+
' % + ' -(% % ' - $" %('
' ( ' - % & % ( ( (
! " ' -(- + (% ' ' (
$ (% (- ' ( $ & % ( ' ( +
% ' ' # - " ' - % -(% %
(' ' ' ( %( ( % $
$ & ( %( ' ( $(% $"
$ ' ( ' - % % $ $ &
. (% % $
$ " ' $" ' '3 % '" $ %% -(% %
$(' $ + ' ' ($ ($ $
( Table 10 % (G % ( %%(- % +
' -(%
Bit 7
Rx RTS
Control
J 8
J E %
Bit 6
Bit 5
Rx Int Select Error Mode
J5E
J ::
J
J * '3
Bit 4
Bit 3
Parity Mode Select
J A( , (&
J ' , (&
J 8 , (&
J ( $
Bit 2
Parity Select
J 2
J $$
Bit 1
Bit 0
Number of Bits/Char.
J 6
J /
J @
J <
Table 20. Mode Registers 1: MR1A, MR1B
Bit 7
Bit 6
Channel Mode
J 8
J 2'
J : ' :
J :
Bit 5
Tx RTS
Control
J 8
J E %
Bit 4
CTS Enable
Tx
J 8
J E %
Bit 3
Bit 2
Bit 1
Stop Bit Length
Bit 0
J 6/1
J /6
J /<<
1 J @6
= J <1
6 J <@6
/ J 1<
@ J
< J 6/1
J /6
J /<<
* J @6
J <1
J <@6
2 J 1<
J
Table 21. Mode Register 2: MR2A, MR2B
Bit 7
Bit 6
Bit 5
' ( '3 '
Table 6
Bit 4
Bit 3
Bit 2
Bit 1
%( '3 '
Table 6
Bit 0
Table 22. Clock Select Registers: CSRA, CSRB
/
Share Link: 
