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It has 16 I/O pins, that'll double most boards' pin count
Four I2C address options, so you can connect 4 expanders to one bus
Each pin can be an input or an output
IRQ output can alert you when input pins change value
This chip does not support internal pull-ups or pull-downs, you will need to add an external resistor if you need one
However, it does have 8-bit linear constant-current LED dimming support so you can connect LEDs without resistors and have great looking dimming without PWM
The first 8 pins can be configured as open drain (as a group)
AW9523 Features:
16 multi-function I/O, each for LED drive (current-source dimming) or GPIO mode
256 steps linear dimming in LED drive mode
Any GPIO can be configured as an input or an output independently
Support interrupt, 8us deglitch, low-level active
Standard I2C interface, AD1/AD0 select I2C device address
SDA, SCL, SHDN, and all GPIO can accept in 1.8V logic input
This website uses cookies, which are necessary for the technical operation of the website and are always set. Other cookies, which increase the usability of this website, serve for direct advertising or simplify interaction with other websites and social networks, will only be used with your consent. More information
