PCA9554D,118 I/O Fadada 8 I²C, SMBus 400 kHz 16-SO

Bayani

PCA9554 da PCA9554A sune na'urorin CMOS-pin 16 waɗanda ke ba da 8 ragowa na Gabaɗaya Maƙasudi daidaitattun Input/Fitarwa (GPIO) don aikace-aikacen I2C-bus/SMBus kuma an haɓaka su don haɓaka dangin NXP Semiconductor na I2C-bus I/O masu faɗaɗa.Haɓakawa sun haɗa da mafi girman ƙarfin tuƙi, juriya na 5 VI/O, ƙarancin wadatar yanzu, daidaitawar I/O ɗaya, mitar agogo 400 kHz, da ƙarami marufi.Masu faɗaɗa I / O suna ba da mafita mai sauƙi lokacin da ake buƙatar ƙarin I / O don masu sauya wutar ACPI, firikwensin, maɓallin turawa, LEDs, magoya baya, da sauransu.PCA9554/PCA9554A ta ƙunshi rijistar Kanfigareshan 8-bit (zabin shigarwa ko fitarwa);8-bit Input Port rajista, 8-bit Output Port rajista da wani 8-bit Polarity Inversion rajista (mai aiki HIGH ko aiki LOW aiki).Mai kula da tsarin zai iya ba da damar I/Os a matsayin ko dai abubuwan shigarwa ko fitarwa ta hanyar rubutawa zuwa raƙuman daidaitawar I/O.Ana adana bayanan kowane shigarwa ko fitarwa a cikin madaidaicin madaidaicin Port Port ko Output rajista.Za a iya juyar da polarity na rijistar karantawa tare da rajistar Juyawa ta Polarity.Mai tsarin tsarin zai iya karanta duk rajista.Kodayake adireshin fil-to-pin da I2C-bus ɗin ya dace da jerin PCF8574, ana buƙatar canje-canjen software saboda haɓakawa kuma ana tattauna su a Bayanin Aikace-aikacen AN469.PCA9554/PCA9554A buɗaɗɗen fitarwar katsewa yana kunna lokacin da kowace jihar shigarwa ta sha bamban da madaidaicin jihar rajistar Port Port kuma ana amfani da ita don nunawa mai sarrafa tsarin cewa yanayin shigarwa ya canza.Sake saitin wutar lantarki yana saita masu rijista zuwa tsoffin ƙimar su kuma yana fara injin jihar na'urar.Fuskokin kayan masarufi guda uku (A0, A1, A2) sun bambanta da kafaffen adireshin I2C-bas kuma suna ba da damar na'urori takwas don raba I2C-bas/SBus iri ɗaya.PCA9554A yayi kama da PCA9554 sai dai kafaffen adireshin I2C-bas ya bambanta yana ba da damar har goma sha shida na waɗannan na'urori (takwas na kowane) akan I2C-bas/SBus iri ɗaya.