PIC16F15213 datasheet(129/439 Pages) MICROCHIP

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rate limited. When a SLRCONx bit is cleared (SLRCONx = 0), the corresponding PORT pin drive slews at the

maximum rate possible.

16.9

ODCONx - Open-Drain Control

The ODCONx register controls the open-drain feature of the port. Open-drain operation is independently selected for

each pin. When a ODCONx bit is set (ODCONx = 1), the corresponding port output becomes an open-drain driver

capable of sinking current only. When a ODCONx bit is cleared (ODCONx = 0), the corresponding port output pin is

the standard push-pull drive capable of sourcing and sinking current.

Important: It is necessary to set open-drain control when using the pin for I2C.

16.10 Edge Selectable Interrupt-on-Change

An interrupt can be generated by detecting a signal at the PORT pin that has either a rising edge or a falling edge.

Individual pins can be independently configured to generate an interrupt. Refer to the “IOC - Interrupt-on-Change”

chapter for more details.

16.11 I2C Pad Control

For this family of devices, the I2C specific pads are available on RB4 and RB6 (20-pin devices only), and RC0 and

RC1 pins. The I2C characteristics of each of these pins is controlled by the RxyI2C registers. These characteristics

include enabling I2C specific slew rate (over standard GPIO slew rate), selecting internal pull-ups for I2C pins, and

selecting appropriate input threshold as per SMBus specifications.

Important: Any peripheral using the I2C pins reads the I2C input levels when enabled via RxyI2C.

16.12 I/O Priorities

Each pin defaults to the data latch after Reset. Other functions are selected with the Peripheral Pin Select logic.

Refer to the “PPS - Peripheral Pin Select Module” chapter for more details.

Analog input functions, such as ADC and comparator inputs, are not shown in the Peripheral Pin Select lists. These

inputs are active when the I/O pin is set for Analog mode using the ANSELx register. Digital output functions may

continue to control the pin when it is in Analog mode.

Analog outputs, when enabled, take priority over digital outputs and force the digital output driver into a High-

Impedance state.

The pin function priorities are as follows:

Port functions determined by the Configuration bits.

Analog outputs (input buffers must be disabled).

Analog inputs.

Port inputs and outputs from PPS.

PIC16F15213/14/23/24/43/44

I/O Ports

and its subsidiaries

Data Sheet

DS40002195E-page 129

PIC16F15213 Datasheet(PDF) 129 Page - Microchip Technology