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

Inkcazo

I-PCA9554 kunye ne-PCA9554A zizixhobo ze-16-pin ze-CMOS ezibonelela ngee-bits ze-8 ze-General Purpose parallel Input/Output (GPIO) yokwandiswa kwe-I2C-bus/SMBus izicelo kwaye zaphuhliswa ukuphucula usapho lwe-NXP Semiconductors ye-I2C-bus I/O izandisi.Uphuculo lubandakanya amandla aphezulu okuqhuba, ukunyamezela kwe-5 VI / O, ukubonelela okuphantsi kwangoku, ukucwangciswa kwe-I / O yomntu ngamnye, i-400 kHz clock frequency, kunye nokupakishwa okuncinci.I-I / O izandisi zibonelela ngesisombululo esilula xa i-I / O eyongezelelweyo iyadingeka kwi-ACPI yokutshintsha kwamandla, izinzwa, amaqhosha okutyhala, ii-LED, abalandeli, njalo njalo.I-PCA9554/PCA9554A iquka irejista ye-8-bit Configuration (Ukhetho lwegalelo okanye imveliso);Irejista ye-8-bit yePort Port, irejista ye-8-bit yeSizibuko kunye nerejista ye-8-bit ye-Polarity Inversion (ukusebenza OKUPHEZULU okanye osebenzayo OKUPHANTSI).Umphathi wenkqubo unokwenza ii-I/Os njengamagalelo okanye iziphumo ngokubhalela i-I/O bits yoqwalaselo.Idatha yegalelo ngalinye okanye imveliso igcinwa kwiPort Input Port ehambelanayo okanye kwirejista yesiGaba sokuPhuma.I-polarity yerejista efundwayo inokuguqulwa kunye nerejista ye-Polarity Inversion.Zonke iirejista zinokufundwa ngumlawuli wenkqubo.Nangona i-pin-to-pin kunye nedilesi ye-I2C-bus ihambelana nothotho lwePCF8574, utshintsho lwesoftware luyafuneka ngenxa yophuculo kwaye kuxoxwe ngalo kwiSicelo seSicelo AN469.I-PCA9554/PCA9554A i-open-drain interrupt output iyasebenza xa nayiphi na imeko yegalelo yahlukile kwisimo sayo sobhaliso lwePort Input ehambelanayo kwaye isetyenziselwa ukubonisa kumphathi wenkqubo ukuba imeko yegalelo itshintshile.Ukusetha kwakhona umbane kucwangcisa iirejista kumaxabiso azo angagqibekanga kwaye kuqaliswe umatshini wemeko yesixhobo.Izikhonkwane ezintathu ze-hardware (A0, A1, A2) ziyahluka kwidilesi ye-I2C-ibhasi esisigxina kwaye zivumele izixhobo ezifikelela kwisibhozo ukuba zabelane nge-I2C-bus/SMBus efanayo.I-PCA9554A iyafana ne-PCA9554 ngaphandle kokuba idilesi ye-I2C-ibhasi esisigxina yahlukile ivumela ukuya kwishumi elinesithandathu kwezi zixhobo (isibhozo ngasinye) kwi-I2C-bus/SMBus efanayo.