标签: pca9557

通过的I2C/SMBus实现方便的并行I/O扩展或接收NXPoctalSMBusregisteredinterfacePCA9557ConvenientparallelI/OexpansionorcollectionviatheI2C/SMBusThisexibledeviceofoadstheI/Ocontrollerinarangeofsystem-managementapplications.ItusestheI2C/SMBusforI/Oexpansionorcollection,supportsuniqueresets,enableschipset-to-peripheralinterfaces,andcanbeusedtosendalertsignalstoLEDs.FeaturesThePCA9557hasitsownresetpins,soitsI/OcanberesetSupportsSMBusorI2C-busI/OexpansionandcollectionwithouttaxingtheI/Ocontroller’sGPIO.ThisisespeciallySupportssimpleBIOSimplementationviaf……