XR82C684
.
Bit
6
Bit
5
Bit
4
C/T
Mode
Timing Source
5" $ $+
8 8 '6 *
%(
8) 8 '6 *
) %(
8-<= $ !(( & .
(
5" $ $+
(
5" $ $+# !((
& .
(
8-<= $
(
8-<= $ !(( & .
Note: The “shaded” options are only available in the 68 pin
PLCC.
Table 13. ACR1[6:4] Bit Field Definition - C/T#1
Bit
6
Bit
5
Bit
4
C/T
Mode
Timing Source
5" $ $+
8 8 '6 *
%(
8! 8 '6 *
! %(
8-<= $ !(( & .
(
5" $ $+
(
5" $ $+#
!(( & .
(
8-<= $
(
8-<= $ !(( & .
Note: The “shaded” options are only available in the 68 pin
PLCC.
Table 13A. ACR2[6:4] Bit Field Definition - C/T#2
" ( Sections D.3.1 D.3.2 ,('& *%
-( - ; 3# (% " (%
-( D D I& E (#
(%('( % 3( 3 3 -%
D.3.1 Timer Mode:
Please note that of the two C/T Modes, the Timer Mode is
the only mode which is relevant to the function of Bit Rate
Selection.
However, for completeness, the Counter
Mode is also discussed below.
$ ( # - '% % ,
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Frequency of Selected Timing Source
T PCTURQT 0 + PCTLRQ
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P<Q L ' % * < ,(% (
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(' - (% % .8 ' '6 %(, &
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*I'& * - %(, * # (
# ( * - ' "%% % * 3%7
Frequency of Selected Timing Source
4 T PCTURQT0 + PCTLRQ
' % * < ,(%% &
', & (# 3( & ,( 6 **'
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Table 1
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