The PCA9555 is a 24-pin CMOS device that provides 16 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, 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.
The PCA9555 consists of two 8-bit Configuration (Input or Output selection); Input, Output
and Polarity Inversion (active HIGH or active LOW operation) registers. 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 read register can be inverted with the Polarity Inversion
register. All registers can be read by the system master. Although pin-to-pin and I2C-bus
address compatible with the PCF8575, software changes are required due to the
enhancements, and are discussed in Application Note AN469.
资源简介：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 improv...
上传时间： 2013-11-13
上传用户：fredguo
资源简介：电子技术基础--模拟电子技术 电子教案 PPT版
上传时间： 2013-04-15
上传用户：eeworm
资源简介：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 impr...
上传时间： 2013-10-10
上传用户：inwins
资源简介：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...
上传时间： 2013-10-21
上传用户：爱死爱死
资源简介：The PCA9536 is an 8-pin CMOS device that provides 4 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. I/O expande...
上传时间： 2013-10-09
上传用户：731140412
资源简介：The PCA9537 is a 10-pin CMOS device that provides 4 bits of General Purpose parallelInput/Output (GPIO) expansion with interrupt and reset for I2C-bus/SMBus applicationsand was developed to enhance the NXP Semiconductors family of I2C-bus I...
上传时间： 2013-10-14
上传用户：wuchunzhong
资源简介：The PCA9538 is a 16-pin CMOS device that provides 8 bits of General Purpose parallelInput/Output (GPIO) expansion with interrupt and reset for I2C-bus/SMBus applicationsand was developed to enhance the NXP Semiconductors family of I2C-bus I...
上传时间： 2014-01-24
上传用户：youmo81
资源简介：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 ...
上传时间： 2014-01-18
上传用户：bs2005
资源简介：I2C bus HDL source and testbench
上传时间： 2013-12-17
上传用户：watch100
资源简介：I2C-bus specification and user manual Rev.03-19 June 2007.pdf
上传时间： 2014-08-19
上传用户：playboys0
