The PCA9534 is a 16-pin CMOS device that provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, 400 kHz clock frequency, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.
上傳時間： 2013-11-17
上傳用戶：vodssv
Nios 的用戶定義接口邏輯實例 有許多人問我使用 Nios 的用戶定義接口邏輯怎么用，想了幾天決定設(shè)計一個實例來說明。該例為一個使用 user to interface logic 設(shè)計的 PWM 實例，其中包括三個文件： plus32.v 是一個為 32bit nios 設(shè)計的 pwm 實例。 plus16.v 是一個為 16bit nios 設(shè)計的 pwm 實例。 test.s 是一個使用中斷調(diào)用 pwm 的匯編語言測試程序。以上模塊和程序均調(diào)試通過，并可穩(wěn)定工作。這里讓大家參考是使大家通過該例來真正理解 user to interface logic 設(shè)計方法，和nios 中通過匯編調(diào)用中斷的方法，所以超值喔。另外熱烈歡迎大家的指導。 注：在設(shè)計 Nios 時，將你調(diào)用的 user to interface logic 插件重命名為 plus_0，這樣我的 test.s 可不作任何改動，你就可用示波器通過 nios 的 plus 管腳觀察到一個要求的輸出。
上傳時間： 2013-11-15
上傳用戶：cc1915
linux 中斷和設(shè)備驅(qū)動 本章介紹L i n u x內(nèi)核是如何維護它支持的文件系統(tǒng)中的文件的，我們先介紹 V F S ( Vi r t u a lFile System，虛擬文件系統(tǒng))，再解釋一下L i n u x內(nèi)核的真實文件系統(tǒng)是如何得到支持的。L i n u x的一個最重要特點就是它支持許多不同的文件系統(tǒng)。這使 L i n u x非常靈活，能夠與許多其他的操作系統(tǒng)共存。在寫這本書的時候， L i n u x共支持1 5種文件系統(tǒng)： e x t、 e x t 2、x i a、 m i n i x、 u m s d o s、 msdos 、v f a t、 p r o c、 s m b、 n c p、 i s o 9 6 6 0、 s y s v、 h p f s、 a ffs 和u f s。無疑隨著時間的推移，L i n u x支持的文件系統(tǒng)數(shù)還會增加。
標簽： linux 中斷 設(shè)備驅(qū)動
上傳時間： 2013-11-13
上傳用戶：zxh122
The PCA9534 is a 16-pin CMOS device that provide 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and was developed to enhance the NXP Semiconductors family of I2C-bus I/O expanders. The improvements include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O configuration, 400 kHz clock frequency, and smaller packaging. I/O expanders provide a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.
上傳時間： 2013-10-10
上傳用戶：inwins
The PCA9535 and PCA9535C are 24-pin CMOS devices that provide 16 bits of GeneralPurpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications and wasdeveloped to enhance the NXP Semiconductors family of I2C-bus I/O expanders. Theimprovements include higher drive capability, 5 V I/O tolerance, lower supply current,individual I/O configuration, and smaller packaging. I/O expanders provide a simplesolution when additional I/O is needed for ACPI power switches, sensors, push buttons,LEDs, fans, etc.
上傳時間： 2013-10-21
上傳用戶：愛死愛死
The PCA9517 is a CMOS integrated circuit that provides level shifting between lowvoltage (down to 0.9 V) and higher voltage (2.7 V to 5.5 V) I2C-bus or SMBus applications.While retaining all the operating modes and features of the I2C-bus system during thelevel shifts, it also permits extension of the I2C-bus by providing bidirectional buffering forboth the data (SDA) and the clock (SCL) lines, thus enabling two buses of 400 pF. Usingthe PCA9517 enables the system designer to isolate two halves of a bus for both voltageand capacitance. The SDA and SCL pins are over voltage tolerant and arehigh-impedance when the PCA9517 is unpowered.
標簽： translating Level 9517 PCA
上傳時間： 2013-12-25
上傳用戶：wsf950131
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
RSM232隔離RS-232收發(fā)器具備電源隔離、電氣隔離、RS-232收發(fā)器，有提高系統(tǒng)穩(wěn)定性，簡化設(shè)計等諸多優(yōu)點。完全符合EIA/TIA-232E和ITU-T V.28規(guī)格，采用5V電源供電，具有2500VDC的隔離電壓，波特率可高達115200bps
上傳時間： 2014-02-22
上傳用戶：ouyangtongze
The TRS232E is a dual driver/receiver that includes a capacitive voltage generator to supply TIA/RS-232-Fvoltage levels from a single 5-V supply. Each receiver converts TIA/RS-232-F inputs to 5-V TTL/CMOS levels.This receiver has a typical threshold of 1.3 V, a typical hysteresis of 0.5 V, and can accept ±30-V inputs. Eachdriver converts TTL/CMOS input levels into TIA/RS-232-F levels. The driver, receiver, and voltage-generatorfunctions are available as cells in the Texas Instruments LinASIC™ library.
上傳時間： 2013-10-07
上傳用戶：waitingfy
The ISO7220 and ISO7221 are dual-channel digital isolators. To facilitate PCB layout, the channels are orientedin the same direction in the ISO7220 and in opposite directions in the ISO7221. These devices have a logic inputand output buffer separated by TI’s silicon-dioxide (SiO2) isolation barrier, providing galvanic isolation of up to4000 V. Used in conjunction with isolated power supplies, these devices block high voltage, isolate grounds, andprevent noise currents on a data bus or other circuits from entering the local ground and interfering with ordamaging sensitive circuitry.
上傳時間： 2013-10-24
上傳用戶：hbsunhui
蟲蟲下載站版權(quán)所有 京ICP備2021023401號-1
