The PCA9548A is an octal bidirectional translating switch controlled via the I2C-bus. TheSCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individualSCx/SDx channel or combination of channels can be selected, determined by thecontents of the programmable control register.An active LOW reset input allows the PCA9548A to recover from a situation where one ofthe downstream I2C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets theI2C-bus state machine and causes all the channels to be deselected as does the internalPower-on reset function.
標(biāo)簽： channel 9548A 9548 PCA
上傳時(shí)間： 2013-10-13
上傳用戶：bakdesec
PCA9548A 是一款通過I2C 總線控制的八進(jìn)制雙向轉(zhuǎn)換開關(guān)。它的每對SCL/ SDA 上行通道可以擴(kuò)展為八對下行通道，可以通過可編程控制寄存器的內(nèi)容來選擇任意單一的SCx/SDx 通道或者組合通道。由多路復(fù)用器的通門，VDD 管腳可以用來限制PCA9547 通過的最高電壓，這使得每一對SCL/SDA 都可以使用不同的總線電壓，因此1.8V、2.5V 或3.3V的器件可以在無其它保護(hù)的情況下與5V 的器件進(jìn)行通信。它的外部上拉電阻將總線拉高至每個(gè)通道所要求的電壓電平，所有I/O 管腳都可以承受5V 電壓。
上傳時(shí)間： 2013-10-13
上傳用戶：hanli8870
The PCA9557 is a silicon CMOS circuit which provides parallel input/output expansion for SMBus and I2C-bus applications. The PCA9557 consists of an 8-bit input port register, 8-bit output port register, and an I2C-bus/SMBus interface. It has low current consumption and a high-impedance open-drain output pin, IO0. The system master can enable the PCA9557’s I/O as either input or output by writing to the configuration register. The system master can also invert the PCA9557 inputs by writing to the active HIGH polarity inversion register. Finally, the system master can reset the PCA9557 in the event of a time-out by asserting a LOW in the reset input. The power-on reset puts the registers in their default state and initializes the I2C-bus/SMBus state machine. The RESET pin causes the same reset/initialization to occur without de-powering the part.
標(biāo)簽： C-bus SMBus reset port
上傳時(shí)間： 2014-01-18
上傳用戶：bs2005
PCA9698 是一款40 位I2C 輸入/輸出擴(kuò)展器，能夠?qū)崿F(xiàn)I2C/SMBus 應(yīng)用中40 位GPIO 的擴(kuò)展
標(biāo)簽： 9698 PCA I2C 擴(kuò)展芯片
上傳時(shí)間： 2013-11-21
上傳用戶：文993
The P82B715 I2C Buffer was designed toextend the range of the local I2C bus out to50 Meters. This application note describesthe results of testing the buffer on severaldifferent types of cables to determine themaximum operating distances possible. Theresults are summarized in a table for easyreference.
標(biāo)簽： extender P82B715 Using I2C
上傳時(shí)間： 2014-12-28
上傳用戶：lou45566
I2C BUS（Inter IC BUS）是NXP 推出的芯片間串行傳輸總線，它以2 根連線實(shí)現(xiàn)了完善的雙向同步數(shù)據(jù)傳送，可以極方便地構(gòu)成多機(jī)系統(tǒng)和外圍器件擴(kuò)展系統(tǒng)。I2C 總線采用了器件地址的硬件設(shè)置方法，通過軟件尋址完全避免了器件的片選線尋址方法，從而使硬件系統(tǒng)具有最簡單而靈活的擴(kuò)展方法。I2C 總線的2 根線（串行數(shù)據(jù)——SDA，串行時(shí)鐘——SCL）連接到總線上的任何一個(gè)器件，每個(gè)器件都應(yīng)有一個(gè)唯一的地址，而且都可以作為一個(gè)發(fā)送器或接收器。此外，器件在執(zhí)行數(shù)據(jù)傳輸時(shí)也可以被看作是主機(jī)或從機(jī)。
上傳時(shí)間： 2013-11-05
上傳用戶：qb1993225
本實(shí)驗(yàn)是基于EasyFPGA030的I2C總線接口模塊設(shè)計(jì)，用EasyFPGA030開發(fā)套件通過I2C協(xié)議實(shí)現(xiàn)對二線制I2C串行EEPROM的讀寫操作，先把數(shù)據(jù)寫入EEPROM，然后再讀取出來顯示在數(shù)碼管上
標(biāo)簽： I2C 總線接口 模塊設(shè)計(jì)
上傳時(shí)間： 2013-10-21
上傳用戶：edisonfather
關(guān)鍵詞 CAT9534、I2C 總線、SMBus、I/O 擴(kuò)展器摘 要CAT9534 是一款帶中斷的8 位并行I2C/SMBus 輸入/輸出端口擴(kuò)展器件
上傳時(shí)間： 2013-10-21
上傳用戶：rocwangdp
關(guān)鍵詞 I2C/SMBus、I/O 口擴(kuò)展摘 要CAT9554 是是一款基于I2C 和SMBus 接口的8 位通用型輸入輸出(GPIO)擴(kuò)展器件
上傳時(shí)間： 2013-12-31
上傳用戶：woshinimiaoye
This application note demonstrates how to write an Inter Integrated Circuit bus driver (I2C) for the XA-S3 16-bitMicrocontroller from Philips Semiconductors.Not only the driver software is given. This note also contains a set of (example) interface routines and a smalldemo application program. All together it offers the user a quick start in writing a complete I2C system applicationwith the PXAS3x.The driver routines support interrupt driven single master transfers. Furthermore, the routines are suitable foruse in conjunction with real time operating systems.
標(biāo)簽： software driver XA-S I2C
上傳時(shí)間： 2013-11-02
上傳用戶：zw380105939
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