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PCA9559 device highlight
Introduction
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Key Features:
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The PCA9559 is a 5-bit multiplexed/1-bit latched 6-bit I2C E2PROM.
It is used for multiplexing a default parallel input with an alternative set of inputs provided via I2C or SMBus.
The PCA9559 is a derivative of the PCA8550 with the addition of open drain outputs to drive different voltage loads.
The PCA9559 also provides the addition of two address pins to allow for up to four PCA9559s per bus.
Typical applications include processor frequency configu-ration, system clock generator frequency selection (FS), voltage identification (VID) configuration, and dual BIOS selection.
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