恩智浦八位SMBus寄存器接口PCA9557

通过的I2C/SMBus实现方便的并行I / O扩展或接收
NXP octal SMBus registered
interface PCA9557




Convenient parallel I/O expansion
or collection via the I2C/SMBus
This exible device ofoads the I/O controller in a range of system-management applications.
It uses the I2C/SMBus for I/O expansion or collection, supports unique resets, enables chipset-to-
peripheral interfaces, and can be used to send alert signals to LEDs.


Features The PCA9557 has its own reset pins, so its I/O can be reset
Supports SMBus or I2C-bus I/O expansion and collection without taxing the I/O controller’s GPIO. This is especially
Supports simple BIOS implementation via f