The PCA9555 is a 24-pin CMOS device that provides 16 bits of General Purpose parallelInput/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed toenhance the NXP Semiconductors family of I2C-bus I/O expanders. The improvementsinclude higher drive capability, 5 V I/O tolerance, lower supply current, individual I/Oconfiguration, and smaller packaging. I/O expanders provide a simple solution whenadditional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.The PCA9555 consists of two 8-bit Configuration (Input or Output selection); Input, Outputand Polarity Inversion (active HIGH or active LOW operation) registers. The systemmaster can enable the I/Os as either inputs or outputs by writing to the I/O configurationbits. The data for each Input or Output is kept in the corresponding Input or Outputregister. The polarity of the read register can be inverted with the Polarity Inversionregister. All registers can be read by the system master. Although pin-to-pin and I2C-busaddress compatible with the PCF8575, software changes are required due to theenhancements, and are discussed in Application Note AN469.
上傳時間： 2013-11-13
上傳用戶：fredguo
eeworm.com VIP專區 單片機源碼系列 67資源包含以下內容：1. P89LPC912單片機數據手冊.pdf2. P89LPC932 Flash單片機使用指南.pdf3. PC MCU串行通信的應用設計方法.pdf4. RSA加解密系統及其單芯片實現.pdf5. PCF8563實時時鐘高精度調整方法.pdf6. PAM2862 1A LED Driver with Int.pdf7. AN070219 PCF8563中斷輸出功能.pdf8. SJA1000 Stand-alone CAN contro.pdf9. PCA82C250 PCA82C251 CAN Transc.pdf10. SJA1000獨立的CAN控制器應用指南.pdf11. PCA82C250 CAN收發器應用指南.pdf12. SCN2681 SCN68681和SCC2691數據通信.pdf13. Philips單片機P89V51RD2簡介.pdf14. 飛利浦SC16C器件和飛利浦低功耗SC16CxxxB器件之間.pdf15. P89V51RD2單片機看門狗的使用方法.pdf16. SC16C554 SC16C654 SC16C554B SC.pdf17. P89V51RD2的加密操作.pdf18. SC16C550應用實例.pdf19. 如何在C語言中調用P89V51RD2的IAP功能.pdf20. P89LPC901實現ADC DAC及UART通信.pdf21. P89LPC900在高精度模數轉換場合的應用.pdf22. P89C51Rx2xx硬件進入ISP的方法.pdf23. Study-3 51單片機開發板原理圖.pdf24. 基于P87LPC760的DALI從機.pdf25. PCA9515D PCA9515DP I2C中繼器.pdf26. PCA9534 8bit I2C bus and SMBus low power IO port with interru.pdf27. LPC900 Flash單片機鍵盤中斷.pdf28. PCA9516 5channel I2C hub.pdf29. PCA9535 PCA9535C 16bit I2C bus.pdf30. LPC700系列單片機看門狗復位應注意的問題.pdf31. PCA9516 I2C中繼器.pdf32. PCA9536 4bit I2C bus and SMBus.pdf33. 內置Reset WDT電路的串行E2PROM原理及應用設計.pdf34. PCA9517 Level translating I2C-.pdf35. PCA9537 4bit I2C bus and SMBus.pdf36. X-tal oscillators on 8-bit mic.pdf37. PCA9517低電壓I2C總線中繼器.pdf38. PCA9538 8bit I2C bus and SMBus.pdf39. 8051系列單片機應用系統的PROTEUS仿真設計.doc40. PCA9518 Expandable 5channel I2.pdf41. PCA9539 PCA9539R 16-bit I2C-bu.pdf42. 基于單總線技術蓄電池監控系統設計.pdf43. PCA9518A I2C 中繼器集線器與擴展器.pdf44. PCA9540B 2channel I2C bus mult.pdf45. 基于AT89C51應用系統的串行通信設計.pdf46. PCA9519 4channel level transla.pdf47. PCA9541 2 to 1 I2C-bus master.pdf48. PCA9519 4通道I2C-bus SMBus 中繼器.pdf49. PCA9544A 4channel I2C multiple.pdf50. PCA9542A 2channel I2C bus mult.pdf51. PCA9544A I2C多路復用器.pdf52. PCA9544中文資料.pdf53. PCA9549 Octal bus switch with.pdf54. PCA9545A/PCA9545B/PCA9545C I2C.pdf55. PCA9549D/PCA9549PW/PCA9549B I2.pdf56. PCA9546A 4 channel I2C bus swi.pdf57. PCA9555 16bit I2C-bus and SMBu.pdf58. PCA9546A I2C多路復用器和開關.pdf59. PCA9670 Remote 8-bit IO expand.pdf60. PCA9547 8 channel I2C bus mult.pdf61. PCA9671 Remote 16-bit IO expan.pdf62. PCA9547D/PW/BS I2C多路復用器和開關.pdf63. PCA9672 Remote 8-bit IO expand.pdf64. PCA9548中文資料.pdf65. PCA9673 Remote 16-bit IO expan.pdf66. PCA9548A 8 channel I2C bus swi.pdf67. PCA9674 PCA9674A Remote 8-bit.pdf68. PCA9548AB I2C多路復用器和開關.pdf69. 8-bit I2C-bus and SMBus IO port with reset.pdf70. PCA9698芯片的應用.pdf71. PCA9698 I2C擴展芯片.pdf72. PCF2123的中斷輸出功能.pdf73. TI新推29款Cortex-M3內核Stelleris AR.pdf74. 端口RS-232工業PC104多串口卡.pdf75. TIPC1000帶視頻輸入接口的嵌入式觸摸平板電腦.pdf76. 串口調試助手用戶手冊.pdf77. PCM8416AS自動校準功能智能型PC104高分辨率多功能.pdf78. TJA1042高速CAN 收發器.pdf79. COS-II調試插件.pdf80. PROFIBUS技術和應用.pdf81. TJA1042 High-speed CAN transce.pdf82. TKStudio IDE集成開發環境升級記錄.pdf83. Replacement of NXP PCA9518 wit.pdf84. TJA1051高速CAN 收發器.pdf85. 1A SIMPLE STEP-DOWN SWITCHING.pdf86. RSM232隔離RS-232收發器.pdf87. TJA1051 High-speed CAN transce.pdf88. DUAL RS-232 DRIVER RECEIVER WI.pdf89. RSM-4055 8通道隔離數字量輸入輸出模塊.pdf90. 外部工具用戶手冊.pdf91. XGate COP10 CANopen 嵌入式通信模塊.pdf92. RSM-6505 5通道熱電偶測量模塊.pdf93. 十六進制編輯器.pdf94. ZigBee模塊ZICM2410應用開發指南.pdf95. RSM-65055通道熱電偶測溫模塊.pdf96. 圖片字模助手.pdf97. ZY00xxGD-10W交直流兩用全電壓輸入AC-DC電源模.pdf98. TKStudio下SDCC_8051用戶使用手冊.pdf99. 定壓輸出隔離穩壓單輸出系列.pdf100. ZY00xxGD-15W交直流兩用全電壓輸入AC-DC電源模.pdf
上傳時間： 2013-04-15
上傳用戶：eeworm
