Register Enum

Definition

Namespace:

Iot.Device.Mcp23xxx

Assembly:

Iot.Device.Bindings.dll

Package:

Iot.Device.Bindings v3.0.0

Mcp23xxx Register

public enum Register

type Register = 

Public Enum Register

Inheritance

Enum

Register

Fields

Name	Value	Description
IODIR	0	Controls the direction of the data I/O. When a bit is set, the corresponding pin becomes an input. When a bit is clear, the corresponding pin becomes an output.
IPOL	1	Configures the polarity on the corresponding GPIO port bits. When a bit is set, the corresponding GPIO register bit will reflect the inverted value on the pin.
GPINTEN	2	Controls the interrupt-on-change feature for each pin. When a bit is set, the corresponding pin is enabled for interrupt-on-change. The DEFVAL and INTCON registers must also be configured if any pins are enabled for interrupt-on-change.
DEFVAL	3	Configures the default comparison value. If enabled (via GPINTEN and INTCON) to compare against the DEFVAL register, an opposite value on the associated pin will cause an interrupt to occur.
INTCON	4	Controls how the associated pin value is compared for the interrupt-on-change feature. When a bit is set, the corresponding I/O pin is compared against the associated bit in the DEFVAL register. When a bit value is clear, the corresponding I/O pin is compared against the previous value.
IOCON	5	Contains several bits for configuring the device. See respective datasheet for more details.
GPPU	6	Controls the pull-up resistors for the port pins. When a bit is set and the corresponding pin is configured as an input, the corresponding port pin is internally pulled up with a 100 kΩ resistor.
INTF	7	Reflects the interrupt condition on the port pins of any pin that is enabled for interrupts via the GPINTEN register. A 'set' bit indicates that the associated pin caused the interrupt. This register is read-only. Writes to this register will be ignored.
INTCAP	8	The INTCAP register captures the GPIO port value at the time the interrupt occurred. The register is read-only and is updated only when an interrupt occurs. The register will remain unchanged until the interrupt is cleared via a read of INTCAP or GPIO.
GPIO	9	Reflects the value on the port. Reading from this register reads the port. Writing to this register modifies the Output Latch (OLAT) register.
OLAT	10	Provides access to the output latches. A read from this register results in a read of the OLAT and not the port itself. A write to this register modifies the output latches that modify the pins configured as outputs.