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XR68C681 Datasheet, PDF (27/75 Pages) Exar Corporation – CMOS Dual Channel UART (DUART) | |||
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XR68C681
D.3 Counter/Timer
((
- '
'3 % '
(
% / (
.( . . (% - / (
$
'
(' '
%
+ % ((
-
%'% % (% (
Figure 9 %
% '3 $(- +
'('(& %
$(
- . %'(
+ %
((
- %'% +
.( '
$ &
((
- ( $
M/4=N
!((&
-(% (% / - = ,% % Table 7 +
(
% (
.( $"
$
((
- %' '
% + (%
M/4=N .
(% ( ''3 %' -(%% + % %
- ( -
+
%(%
$
'(%
%'(
('(
(($ & /
,% -(%%
" :
#,
5
5*
(($ & /
.(
$ *
14 5%
.DE
,1
M=/N
Figure 9. A Block Diagram of the Circuitry
Associated with the Counter/Timer
Bit 6
Bit 5
Bit 4
C/T Mode
(
(
(
(
Timing Source
2!
#
#,
5
5 '3 + '
%(
5* 5 '3 + '
*
%(
5.:7 #
(($$ & /
2!
#
#,
2!
#
#," (($$ & /
5.:7 #
5.:7 #
(($$ & /
Table 7. ACR[6:4] Bit Field Definition - C/T
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