Device Class

Encapsulates PCA9534 (and similar) I²C GPIO Expanders.

Inheritance Hierarchy

SystemObject
IO.Devices.PCA9534Device

Namespace: IO.Devices.PCA9534
Assembly: libsimpleio (in libsimpleio.dll) Version: 2.2025.76.2

Syntax

public class Device

The Device type exposes the following members.

Constructors

	Name	Description
	Device	Constructor for a PCA9534 (or similar) GPIO Expander.

Properties

	Name	Description
	Config	This read-only property returns the last value written to the configuration register.
	Latch	This read-only property returns the last value written to the output port register.

Methods

	Name	Description
	Read	Return actual state of the GPIO pins.
	Read(Byte)	Read from the specified PCA9534 device register.
	Write(Byte)	Write all GPIO pins.
	Write(Byte, Byte)	Write to the specified PCA9534 device register.

Fields

	Name	Description
	AllInputs	Configure all pins as inputs.
	AllNormal	Configure all inputs as normal polarity.
	AllOff	Turn all outputs off.
	AllOutputs	Configure all pins as outputs.
	ConfigurationReg	Configuration Register address.
	InputPolarityReg	Input Port Polarity Register address.
	InputPortReg	Input Port Register address.
	MAX_PINS	The number of available GPIO pins per chip.
	OutputPortReg	Output Port Register address.