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

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I-PCA9554 kanye ne-PCA9554A ngamadivayisi we-CMOS wamaphini angu-16 ahlinzeka ngamabhithi angu-8 we-General Purpose parallel Input/Output (GPIO) ukunwetshwa kwezinhlelo zokusebenza ze-I2C-bus/SMBus futhi athuthukiswa ukuze kuthuthukiswe umndeni we-NXP Semiconductors we-I2C-bus I/O izandisi.Ukuthuthukiswa kufaka phakathi amandla okushayela aphezulu, ukubekezelelana kwe-5 VI/O, ukuhlinzeka kwamanje okuphansi, ukumiswa kwe-I/O yomuntu ngamunye, imvamisa yewashi engu-400 kHz, nokupakishwa okuncane.Izandisi ze-I/O zinikeza isisombululo esilula uma i-I/O eyengeziwe idingeka ekushintsheni kwamandla e-ACPI, izinzwa, izinkinobho zokucindezela, ama-LED, abalandeli, njalonjalo.I-PCA9554/PCA9554A iqukethe irejista Yokucushwa eyi-8-bit (Ukukhetha Okokufaka noma Okuphumayo);Irejista yembobo yokufaka engu-8-bit, irejista yembobo yokuphuma engu-8-bit kanye nerejista ye-Polarity Inversion engu-8-bit (ukusebenza okusebenzayo OKUPHEZULU noma okusebenzayo OKUPHANSI).Umphathi wesistimu angakwazi ukunika amandla ama-I/O njengokufakwayo noma okuphumayo ngokubhalela amabhithi okucushwa e-I/O.Idatha yokokufaka ngakunye noma okukhiphayo igcinwa Embotsheni Yokufaka ehambisanayo noma irejista Yembobo yokuphumayo.I-polarity yerejista efundiwe ingaguqulwa ngerejista ye-Polarity Inversion.Wonke amarejista angafundwa yinkosi yesistimu.Nakuba ikheli le-pin-to-pin kanye ne-I2C-bus lihambisana nochungechunge lwe-PCF8574, izinguquko zesofthiwe ziyadingeka ngenxa yezithuthukisi futhi kuxoxwa ngazo ku-Application Note AN469.I-PCA9554/PCA9554A okukhiphayo kokuphazamiseka kwe-open-drain kwenziwa kusebenze uma noma isiphi isimo sokufaka sihluka esimweni saso serejista ye-Input Port futhi sisetshenziselwa ukukhombisa umphathi wesistimu ukuthi isimo sokufaka sishintshile.Ukusetha kabusha amandla kusetha amarejista kumanani awo azenzakalelayo futhi kuqalise umshini wesimo sedivayisi.Izikhonkwane ezintathu zehadiwe (A0, A1, A2) zishintsha ikheli lebhasi le-I2C eligxilile futhi zivumela amadivayisi afika kwayisishiyagalombili ukwabelana nge-I2C-bus/SMBus efanayo.I-PCA9554A iyafana ne-PCA9554 ngaphandle kokuthi ikheli lebhasi le-I2C eligxilile lihlukile ngokuvumela kufika eshumini nesithupha kulawa madivayisi (ayisishiyagalombili ngalinye) ku-I2C-bus/SMBus efanayo.