单线网络控制远程SPI外设

制器（低电平有效CS，DIN和CLK），所需的1-Wire®串行网络解决三个1线开关（DS2413的）。创建的第一个开关片选（低电平有效CS），第二直接创造的串行数据线（DIN）和第三开关与帮助独占或门产生串行时钟（CLK）。Maxim>Designsupport>Appnotes>1-WireDevices>APP4505Maxim>Designsupport>Appnotes>AnalogSwitchesandMultiplexers>APP4505Keywords:1-wirenetworks,1-wireswitches,SPIperipherals,edgedetector,oneshotNov11,2010APPLICATIONNOTE4505One-WireNetworkControlsRemoteSPIPeripheralsBy:MichaelPetersenAbstract:Toproducethe3-wireSPIinterfacerequiredbyaMAX7221displaycontroller(active-lowCS,DIN,andCLK),this1-Wirenetworkseriallyaddressesthree1-Wireswitches(DS2413).ThefirstswitchcreatesChipSelectdirectly(active-lowCS),thesecondcreatestheserial-datalinedirectly(DIN),andthethirdswitch―withthehe