App note: Low Voltage Agile I/O GPIO Input/Output Characteristics

ap_NXP_an11496

App note (PDF) on NXP’s Agile I/O expander, discussing its capabilities and how to use it efficiently.

I2C-bus GPIO devices are widely used and expand a control processor’s pins to 8-, 16- or 24- bits of general-purpose input or output. The characteristic of these I/O needs to be accurately known to efficiently use them in a system. This application note will explore the actual electrical characteristics of Agile I/O GPIO pins.

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