參數(shù)資料
型號(hào): XR88C681CJ
廠商: EXAR CORP
元件分類(lèi): 微控制器/微處理器
英文描述: CMOS DUAL CHANNEL UART (DUART)
中文描述: 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁(yè)數(shù): 56/99頁(yè)
文件大?。?/td> 1913K
代理商: XR88C681CJ
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 ($
- (% ! +" ( (% ( $(%'%%
(
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+(- -% ( '(+& %%
C/5
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-
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Figure 29
(% %&% '%(%% +
%(
5
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5
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5 '3
Figure 29. Example of a Serial Data
Transmission System
9 % + %%
%' (% %(-& +%
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Figure 30
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相關(guān)PDF資料
PDF描述
XR88C681J CMOS DUAL CHANNEL UART (DUART)
XR88C92CJ DUAL UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER
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