
XR82C684
.4
+% Table 15 Table 15A '% * %
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PBQ PBQ % %(,(*(' ( ) *
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PBQ PBQ ) * "((&
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% (& "%%( " L K '
X - The Select Extend bit
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Table 16
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5" (%
Register
Contents
Resulting Action
,(% #
0
" )2 ' 5" )( 8 L
,(% #
" )2 ' 5" )( 8 L
,(% )# )
" )2 ' 5" )( 8 L
,(% )# )
)
" )2 ' 5" )( 8 L
Table 16. Command Register Controls Over the Extend Bit
Note:
If the user programs either nibble of the Clock
Select Register (CSRn[7:4] or CSRn[3:0]) with
values ranging from 016 to C16, then the user is
using the BRG as a source for timing. How-
ever, these standard bit rates (presented in
Table 15) apply only if the X1/CLK pin is driven
with a 3.6864 MHz signal. If a signal with a
different frequency (fo) is applied to the X1/CLK
pin, then the QUART channel is running at the
following baud rate:
Actual baud Rate =
PTable 9 Baud Rate ValueQT fo
4.0.@ MHz
( * (% 3 ;J B4B0 ;J
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Table 15A
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B4B0;J %(, $* %(, 3( (** *I'&
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Actual baud Rate =
PTable 9A Baud Rate ValueQT fo
B4B0 MHz
( * (% 3 ;J B4B0 ;J
(&# % ( %# , & )2%#
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