KSZ9567RTXI datasheet(15/232 Pages) MICROCHIP

15 / 232 page

 2017-2019 Microchip Technology Inc.

DS00002329D-page 15

KSZ9567R

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

Power Management Event.

This output signal indicates that an energy detect event has

occurred. It is intended to wake up the system 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.

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 an 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 an oscillator, this pin is

left unconnected.

25/125MHz

Reference

Clock Output

SYNCLKO

O24

25/125MHz reference clock output, derived from the crystal

input or the recovered clock of any PHY. This signal may be

used for Synchronous Ethernet.

General

Purpose

Input/Output 1

GPIO_1

IPU/O8

This signal can be used as an input or output for use by the

IEEE 1588 event trigger or timestamp capture units. It will

be synchronized to the internal IEEE 1588 clock. This pin

can also be controlled (as an output) or sampled (as an

input) via device registers.

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.

No Connect

No Connect. For proper operation, this pin must be left

unconnected.

Power/Ground Pins

+3.3/2.5/1.8V

I/O Power

VDDIO

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

+2.5V

Analog Power

AVDDH

+2.5V Analog Power

+1.2V

Analog Power

AVDDL

+1.2V Analog Power

+1.2V

Digital Power

DVDDL

+1.2V Digital Power

Ground

GND

Ground (pins and pad)

TABLE 3-2:

PIN DESCRIPTIONS (CONTINUED)

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

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