XR68C681 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XR68C681' PDF : 75 Pages View PDF
XR68C681
D.4 External Inputs
% + % + # , (% #,
#,6 % $ % $( ' ! (% ((-
' '3 % ((- % ' % + %( % $
' ( % + ' % , % % '
% '(+& ' '3 %(-" ( $ + %
! (%" (% 5 /5 ' '3 %(-K ( ' '3
% ' -(% % % $ ( $
$(%'%%( ( (% $ ( +'( " %
% Section E
D.5 Clock Select Registers, CSRA and CSRB
# Figure 5" '3 ' -(% % %
14 5.% ' '3 % ' -(% % %
% ' % ' (' ' '3 %(-% ( $ (
%( % $ ' ( % + ' % %
% % ' 1 $(++ %$ $ ( %
+ *0" .( " %
! ( % ((- % ' + %( %
$ ' ( % Table 8 $ Table 9 %
( % ( ' % + % $
' '3 % ' $ ((- %( % $ ' ( %
Bit 7
Bit 6
Bit 5
' ( '3 '
Table 9
Bit 4
Bit 3
Bit 2
Bit 1
%( '3 '
Bit 0
Table 8. Bit Format of the Clock Select Registers, CSRA and CSRB
Field
CSR[7:4]
CSR[3:0]
Bit Rate
ACR[7] = 0 (Bit Rate Set #1)
ACR[7] = 1 (Bit Rate Set #2)
X=0
X=1
X=0
X=1
6
@6
@6
6
1=6
1=6
1=6
1=6
6
6
1
1/
1
1/
/
==7
/
==7
<<7
<<7
6
6@/7
6@/7
=
67
=
67
=<
=<
=<
=<
@
<
<
@
/
/
/
/
1<=7
7
7
1<=7
(
(
(
(
2! /5
2! /5
2! /5
2! /5
2! 5
2! 5
2! 5
2! 5
Table 9. Bit Format of the Clock Select Registers CSR[3:0] and CSR[7:4]
Share Link: 
