参数资料
型号: XR82C684J-F
厂商: Exar Corporation
文件页数: 68/107页
文件大小: 0K
描述: IC UART CMOS QUAD 68PLCC
标准包装: 19
特点: *
通道数: 4,QUART
FIFO's: 3 字节
电源电压: 5V
安装类型: 表面贴装
封装/外壳: 68-LCC(J 形引线)
供应商设备封装: 68-PLCC
包装: 管件
XR82C684
.4
+ % Table 15 Table 15A ' % * %
%'(*& * 3(, %7
PBQ PBQ % %(,(*(' ( ) *
"( (& ,(%%
8 5" (
PBQ PBQ ) * "( (&
,(%# ' %( & , &
3((, """"""" """"""" # (
% ' # %'( & : 7 %**("
% (& "%%( " L K '
X - The Select Extend bit
5' %( '(# 3(( %
" ( ' % ' & 3((,
( ' K% ,(%
, (% (* ( ' * ( Table 2
Table 16
%(J% % ' %# ( **'
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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%
<(63(%# ( %# * )2% % % (
Table 15A
& & (* 8-<= ( (% ( 3(
B4B0;J %(, $* %(, 3( (** *I'&
* (% ( 8-<= (# '
(% (, * 3(,
Actual baud Rate =
PTable 9A Baud Rate ValueQT fo
B4B0 MHz
( * (% 3 ;J B4B0 ;J
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* * % ( Table 15 Table 15A
1X vs 16X Clock Signals
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/.8 ' '61
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