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

Tsanangudzo

Iyo PCA9554 uye PCA9554A 16-pini CMOS zvishandiso zvinopa 8 bits eGeneral Chinangwa parallel Input/Output (GPIO) yekuwedzera yeI2C-bhazi/SMBus maapplication uye akagadziridzwa kusimudzira iyo NXP Semiconductors mhuri yeI2C-bhazi I/O vawedzeredzi.Iko kuvandudzwa kunosanganisira kugona kwekutyaira kwepamusoro, 5 VI / O kushivirira, kuderera kwekupa ikozvino, yega I/O kumisikidza, 400 kHz wachi frequency, uye kurongedza kudiki.I/O vawedzeredzi vanopa mhinduro iri nyore kana yakawedzera I/O ichidikanwa kune ACPI magetsi switch, sensors, push mabhatani, maLED, mafeni, zvichingodaro.Iyo PCA9554/PCA9554A ine 8-bit Configuration register (Input or Output selection);8-bit Input Port register, 8-bit Inobuda Port register uye 8-bit Polarity Inversion register (inoshanda HIGH kana inoshanda YAKADZIKA kushanda).Iyo sisitimu master inogona kugonesa iyo I/Os senge yekupinza kana zvinobuda nekunyorera kune I/O mabhiti ekumisikidza.Iyo data yekuisa yega yega kana inobuda inochengetwa muinopindirana Input Port kana Output Port register.Iyo polarity yerejista yekuverenga inogona kuchinjika nePolarity Inversion register.Marejista ese anogona kuverengerwa nesystem master.Kunyangwe pini-kupini uye I2C-bhazi kero inoenderana nePCF8574 nhevedzano, shanduko yesoftware inodiwa nekuda kwekuwedzera uye inokurukurwa muChinyorwa Chekushandisa AN469.Iyo PCA9554/PCA9554A yakavhurika-kuvhiringidza inobuda inobatidzwa kana chero mamiriro ekuisa asiyana neayo anowirirana Input Port rejista state uye inoshandiswa kuratidza kune system master kuti mamiriro ekuisa achinja.Iyo magetsi-on reset inoseta marejista kune yavo default kukosha uye inotanga iyo mudziyo mamiriro muchina.Matatu mapini (A0, A1, A2) anosiyanisa yakagadziriswa I2C-bhazi kero uye inobvumira anosvika masere maturusi kugovera yakafanana I2C-bhazi/SMBus.Iyo PCA9554A yakafanana nePCA9554 kunze kwekunge yakagadziriswa I2C-bhazi kero yakasiyana ichibvumira kusvika gumi nenhanhatu yemidziyo iyi (masere ega ega) pane imwechete I2C-bhazi/SMBus.