參數(shù)資料
型號: XR88C681
廠商: Exar Corporation
英文描述: CMOS DUAL CHANNEL UART (DUART)
中文描述: CMOS雙通道UART(杜阿爾特)
文件頁數(shù): 56/99頁
文件大小: 1913K
代理商: XR88C681
XR88C681
6/
Register
Contents
Resulting Action
$ -(% "
=
/
! *0 ' 2!$ *( 5 J
$ -(% "
/
! *0 ' 2!$ *( 5 J
$ -(% *" *
/
! *0 ' 2!$ *( 5 J
$ -(% *" *
*
/
! *0 ' 2!$ *( 5 J
Table 19. Command Register Controls Over the Extend Bit
Note:
IftheuserprogramseithernibbleoftheClockSelectRegister(CSRn[7:4]orCSRn[3:0])withvaluesrangingfrom016toC16,
thentheuserisusingtheBRGasasourcefortiming. However, thesestandard bitrates (presentedin Table 18)apply onlyif
theX1/CLKpinisdrivenwitha3.6864MHzsignal. Ifasignalwithadifferentfrequency(fo)isappliedtotheX1/CLKpin,then
the DUART channel is running at the following baud rate:
Actual Baud Rate =
N / *$ ;O R +
1/=/< 8I
provided that fo is between 2.0 MHz and 4.0 MHz.
Additionally, as in the case for standard baud rates, the actual frequency of the clock signal will be 16 times these values.
1X vs 16X Clock Signals
% C5 '3D $ C/5 '3D ($
- (% ! +" ( (% ( $(%'%%
(
(-
$
%(-(+(''
%% '($ %( $ & +' + /
B% C5 ''3D & %% %(-% '
( ($ (% %$ ''& ''$
- '''& ( % '($ (
% + /5 ''3 ( ( + 5 ''3
+(- -% ( '(+& %%
C/5
''3D
'( ( + '% (% ''3$ &
' ((-%' + ((- *'3 #+(%
'( (% '( $ (% '((- $ +
%( %(" %( (% % ''3$ & (%
' ((- %' 8'" (% -
''3 +E'& + '( (% !'&
% %
+
%(
''(%('
+
'('(
-
'( $
%(
-$
%( $ !'& % $ " %++('(
$(++'% ( +E'(% +
' '( $ %( ' '(
( % ( '((- '%%" % %$ (
+(- $(%'%%(
(% (%
%&'%
%(
$
'( $
''3 %'%
%
% $('$ (
%( 5" $ ' '( 5
%( $ %(%%( %&%
Figure 29
(% %&% '%(%% +
%(
5
'(
5
5 '3
5 '3
Figure 29. Example of a Serial Data
Transmission System
9 % + %%
%' (% %(-& +%
$ '((%&%(- %($'
( ($
'( (% ''3$ &
+ %("
Figure 30
%%
%% + (%
相關(guān)PDF資料
PDF描述
XR88C681CJ CMOS DUAL CHANNEL UART (DUART)
XR88C681J CMOS DUAL CHANNEL UART (DUART)
XR88C92CJ DUAL UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER
XR88C92CP DUAL UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER
XR88C92CV DUAL UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR-88C681/24CN 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART
XR-88C681/24N 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART
XR-88C681/28CN 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART
XR-88C681/28CP 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART
XR-88C681/28M 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART