資料介紹
This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 1.65-V to 5.5-V VCC operation. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].
The TCA9555 consists of two 8-bit Configuration (input or output selection), Input Port, Output Port, and Polarity Inversion (active high or active low operation) registers. At power on, the I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.
The system master can reset the TCA9555 in the event of a timeout or other improper operation by utilizing the power-on reset feature, which puts the registers in their default state and initializes the I2C/SMBus state machine.
The TCA9555 open-drain interrupt (INT) output is activated when any input state differs from its corresponding Input Port register state and is used to indicate to the system master that an input state has changed.
INT can be connected to the interrupt input of a microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus. Thus, the TCA9555 can remain a simple slave device.
The device outputs (latched) have high-current drive capability for directly driving LEDs.
Although pin-to-pin and I2C-address is compatible with the PCF8575, software changes are required due to the enhancements.
The TCA9555 is identical to the TCA9535, except for the inclusion of the internal I/O pullup resistor, which pulls the I/O to a default high when configured as an input and undriven.
Three hardware pins (A0, A1, and A2) are used to program and vary the fixed I2C address and allow up to eight devices to share the same I2C bus or SMBus. The fixed I2C address of the TCA9555 is the same as the PCF8575, PCF8575C, and PCF8574, allowing up to eight of these devices in any combination to share the same I2C bus or SMBus.
- NCA9555帶中斷的16位I2C總線I/O端口英文手冊 1次下載
- TCA9555低電壓16位I2C和SMBus I/O擴展器數據表
- TCA6416低壓16位I2C和SMBus I/O擴展器數據表
- 具有中斷輸出和配置寄存器的PCA9555遠程16位I2C和 SMBus I/O擴展器數據表
- NCA9555 I2C 16位GPIO擴展兼容替代TI的PCA9535/PCA9555
- PCA9554A,pdf(REMOTE 8-BIT I2C
- PCA9536,pdf(Remote 4-Bit I2C a
- PCA9535,pdf(Remote 16-Bit I2C
- TCA9535,pdf(Low Voltage 16-Bit
- PCF8575C,pdf(Remote 16-Bit I2C
- PCF8575,pdf(Remote 16-Bit I2C
- MAXQ61C,pdf (16-Bit Microcontr
- PCA9555—帶中斷的16位I2C和SMBus IO口產品
- PCA9555 16bit I2C-bus and SMBu
- pca9555 pdf datasheet (16-bit
- T113 i2c gpio拓展芯片xl9555開發應用筆記 1781次閱讀
- I2C地址跳變問題的調試案例 1115次閱讀
- I2C通信協議及其工作原理 4481次閱讀
- Linux I2C驅動入門知識科普 1515次閱讀
- I2C通信的詳細講解 13.4w次閱讀
- 什么是I2C通信協議? 7569次閱讀
- i2c總線用來做什么_i2c總線數據傳輸過程 7086次閱讀
- 微雪電子MCP23017 IO擴展模塊16IO口 I2C接口簡介 1.3w次閱讀
- fireflyAIO-3288C主板I2C簡介 1257次閱讀
- 基于MCS-51單片機I2C總線接口電路的設計 3245次閱讀
- 詳解I2C總線通信 1w次閱讀
- AT89S52單片機并行端口模擬I2C總線協議讀寫AT24C04的設計 2584次閱讀
- I2C總線的特點、控制技術與傳輸分析 9911次閱讀
- u-boot i2c的調試 2158次閱讀
- 《振南電子STM32視頻教程》第八講:I2C總線 1077次閱讀
下載排行
本周
- 1TC358743XBG評估板參考手冊
- 1.36 MB | 330次下載 | 免費
- 2開關電源基礎知識
- 5.73 MB | 11次下載 | 免費
- 3嵌入式linux-聊天程序設計
- 0.60 MB | 3次下載 | 免費
- 4DIY動手組裝LED電子顯示屏
- 0.98 MB | 3次下載 | 免費
- 5基于FPGA的C8051F單片機開發板設計
- 0.70 MB | 2次下載 | 免費
- 651單片機窗簾控制器仿真程序
- 1.93 MB | 2次下載 | 免費
- 751單片機PM2.5檢測系統程序
- 0.83 MB | 2次下載 | 免費
- 8基于51單片機的RGB調色燈程序仿真
- 0.86 MB | 2次下載 | 免費
本月
- 1OrCAD10.5下載OrCAD10.5中文版軟件
- 0.00 MB | 234315次下載 | 免費
- 2555集成電路應用800例(新編版)
- 0.00 MB | 33566次下載 | 免費
- 3接口電路圖大全
- 未知 | 30323次下載 | 免費
- 4開關電源設計實例指南
- 未知 | 21549次下載 | 免費
- 5電氣工程師手冊免費下載(新編第二版pdf電子書)
- 0.00 MB | 15349次下載 | 免費
- 6數字電路基礎pdf(下載)
- 未知 | 13750次下載 | 免費
- 7電子制作實例集錦 下載
- 未知 | 8113次下載 | 免費
- 8《LED驅動電路設計》 溫德爾著
- 0.00 MB | 6656次下載 | 免費
總榜
- 1matlab軟件下載入口
- 未知 | 935054次下載 | 免費
- 2protel99se軟件下載(可英文版轉中文版)
- 78.1 MB | 537798次下載 | 免費
- 3MATLAB 7.1 下載 (含軟件介紹)
- 未知 | 420027次下載 | 免費
- 4OrCAD10.5下載OrCAD10.5中文版軟件
- 0.00 MB | 234315次下載 | 免費
- 5Altium DXP2002下載入口
- 未知 | 233046次下載 | 免費
- 6電路仿真軟件multisim 10.0免費下載
- 340992 | 191186次下載 | 免費
- 7十天學會AVR單片機與C語言視頻教程 下載
- 158M | 183279次下載 | 免費
- 8proe5.0野火版下載(中文版免費下載)
- 未知 | 138040次下載 | 免費
評論
查看更多