CEC1712 datasheet(136/338 Pages) MICROCHIP

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CEC1712

DS00003416C-page 136

 2020-2021 Microchip Technology Inc.

11.0 GPIO INTERFACE

11.1

General Description

The CEC1712 GPIO Interface provides general purpose input monitoring and output control, as well as managing many

aspects of pin functionality; including, multi-function Pin Multiplexing Control, GPIO Direction control, PU/PD (PU_PD)

resistors, asynchronous wakeup and synchronous Interrupt Detection (int_det), GPIO Direction, and Polarity control, as

well as control of pin drive strength and slew rate.

Features of the GPIO Interface include:

• Inputs:

- Asynchronous rising and falling edge wakeup detection

- Interrupt High or Low Level

• On Output:

- Push Pull or Open Drain output

• Pull up or pull down resistor control

• Interrupt and wake capability available for all GPIOs

• Programmable pin drive strength and slew rate limiting

• Group- or individual control of GPIO data.

• Multiplexing of all multi-function pins are controlled by the GPIO interface

11.2

Block Diagram

The GPIO Interface Block Diagram shown in Figure 11-1 illustrates the functionality of a single CEC1712 GPIO Interface

pin. The source for the Pin Multiplexing Control, Interrupt Detection (int_det), GPIO Direction, and Polarity controls in

Figure 11-1 is a Pin Control Register that is associated with each pin (see Section 11.6.1.1, "Pin Control Register," on

page 141).

FIGURE 11-1:

GPIO INTERFACE BLOCK DIAGRAM

GPIOxxx PIN

GPIO Input

Read

MUX

(MUX = 00)

Read

Polarity

MUX

Input 3 (MUX = 11)

MUX

GPIO Direction

Input 2 (MUX = 10)

Input 1 (MUX = 01)

Interrupt

Detector

Output 1 (MUX = 01)

Output 2 (MUX = 10)

Output 3 (MUX = 11)

GPIO Output

Write

Mux Control

Interrupt Detection

Interrupt

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