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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT82B42R датащи(PDF) 59 Page - Holtek Semiconductor Inc |
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HT82B42R датащи(HTML) 59 Page - Holtek Semiconductor Inc |
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59 / 86 page  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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