KSZ9563RNXI-TR datasheet(15/226 Pages) MICROCHIP

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DS00002419D-page 15

KSZ9563R

Miscellaneous Pins

Interrupt

INTRP_N

OPU

Active low, open-drain interrupt.

Note:

This pin requires an external pull-up resistor.

Power

Management

Event

PME_N

IPU/O8

Power Management Event.

This output signal indicates that an energy detect event has

occurred. It is intended to be used as a system request to

wake up from a low power mode.

Note:

The assertion polarity is programmable (default

active low). An external pull-up resistor is

required for active-low operation; an external

pull-down resistor is required for active-high

operation.

Note:

This pin also provides configuration strap func-

tions during hardware/software resets. Refer to

Section 3.2.1, "Configuration Straps" for addi-

tional information.

System Reset

RESET_N

IPU

Active low system reset.

The device must be reset either during or after power-on.

An RC circuit is suggested for power-on reset.

Crystal Clock /

Oscillator Input

ICLK

Crystal clock / oscillator input.

When using a 25MHz crystal, this input is connected to one

lead of the crystal. When using a 2.5V oscillator, this pin is

the input from the oscillator. The crystal oscillator should

have a tolerance of ±50ppm.

Crystal Clock

Output

OCLK

Crystal clock / oscillator output.

When using a 25MHz crystal, this output is connected to

one lead of the crystal. When using a 2.5V oscillator, this

pin is left unconnected.

General

Purpose

Input/Output 1

GPIO_1

IPU/O8

This signal can be used for IEEE 1588 applications and is

synchronized to the IEEE 1588 clock. It can be pro-

grammed as an input for timestamp capture, or an output

for even trigger. A host processor can be used to control (as

an output) or sample (as an input) this signal via device reg-

isters.

General

Purpose

Input/Output 2

GPIO_2

IPU/O8

This signal can be used for IEEE 1588 applications and is

synchronized to the IEEE 1588 clock. It can be pro-

grammed as an input for timestamp capture, or an output

for even trigger. A host processor can be used to control (as

an output) or sample (as an input) this signal via device reg-

isters.

Transmit

Output Current

Set Resistor

ISET

Transmit output current set resistor.

This pin configures the physical transmit output current. It

must be connected to GND through a 6.04kΩ 1% resistor.

Power/Ground Pins

+3.3/2.5/1.8V

I/O Power

VDDIO

+3.3V / +2.5V / +1.8V I/O Power

+3.3/2.5V

Analog Power

AVDDH

+3.3V / +2.5V Analog Power

+1.2V

Analog Power

AVDDL

+1.2V Analog Power

TABLE 3-2:

PIN DESCRIPTIONS (CONTINUED)

Name

Symbol

Buffer

Type

Description

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