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HT82B42R bảng dữ liệu(PDF) 59 Page - Holtek Semiconductor Inc

tên linh kiện HT82B42R
Giải thích chi tiết về linh kiện  I/O MCU with USB Interface
PDF  86 Pages
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nhà sản xuất  HOLTEK [Holtek Semiconductor Inc]
Trang chủ  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT82B42R bảng dữ liệu(HTML) 59 Page - Holtek Semiconductor Inc

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Rev. 1.00
58
October 27, 2011
Rev. 1.00
59
October 27, 2011
HT82B42R/HT82B42RE
I/O MCU with USB Interface
SPIR Register
Bit
7
6
5
4
3
2
1
0
Name
―
―
―
―
SPI_EN SPI_CSEN SPI_MODE SPI_CPOL
R/W
―
―
―
―
R/W
R/W
R/W
R/W
POR
―
―
―
―
0
0
0
0
Bit7~4
Unimplemented
Bit3
SPI_EN:SPIinterfacepinscontrol
0:I/Omode(default)
1:SPImode
Bit2
SPI_CSEN:SPIsoftwarebitCSENfunctioncontrol
0:disable.TheCSENbithasnoeffectontheSCSpinandtheSCSpinisusedasan
I/Opin
1:enable.TheCSENbitisusedastheenable/disablecontrolfortheSCSpin
Bit1
SPI_MODE:DeterminesSPIclockSCKactiveclockedgetype
SPI_CPOL=0
0:SCKishighbaselevelanddatacaptureatSCKrisingedge
1:SCKishighbaselevelanddatacaptureatSCKfallingedge
SPI_CPOL=1
0:SCKislowbaselevelanddatacaptureatSCKfallingedge
1:SCKislowbaselevelanddatacaptureatSCKrisingedge
TheSPI_MODEandSPI_CPOLbitsareusedtosetupthewaythattheclocksignal
outputsandinputsdataontheSPIbus.Thesetwobitsmustbeconfiguredbefore
datatransferisexecutedotherwiseanerroneousclockedgemaybegenerated.The
SPI_CPOLbitdeterminesthebaseconditionoftheclockline.Ifthebitishigh,then
theSCKlinewillbelowwhentheclockisinactive.WhentheSPI_CPOLbitis
low,thentheSCKlinewillbehighwhentheclockisinactive.TheSPI_MODEbit
determinesactiveclockedgetypewhichdependsupontheconditionofSPI_CPOL
bit.
Bit0
SPI_CPOL:DeterminesthebaseconditionoftheSPIclocklineSCK
0:theSCKlinewillbehighwhentheSPIclockisinactive
1:theSCKlinewillbelowwhentheSPIclockisinactive
TheSPI_CPOLbitdeterminesthebaseconditionoftheSPIclockline,ifthebitis
high,thentheSCKlinewillbelowwhentheclockisinactive.WhentheSPI_CPOL
bitislow,thentheSCKlinewillbehighwhentheclockisinactive.



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