One-Wire Network Controls Remote SPI Peripherals

Abstract:Toproducethe3-wireSPI™interfacerequiredbyaMAX7221displaycontroller(active-lowCS,DIN,andCLK),this1-Wire®networkseriallyaddressesthree1-Wireswitches(DS2413).ThefirstswitchcreatesChipSelectdirectly(active-lowCS),thesecondcreatestheserial-datalinedirectly(DIN),andthethirdswitch—withthehelpofthreeexclusive-ORgates—createstheserialclock(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