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KSZ8051MNL

10BASE-T/100BASE-TX Automotive Physical Layer Transceiver

Microchip Technology 

KSZ8051MNL/RNL

TABLE 2-1: SIGNALS - KSZ8051MNL (CONTINUED)

Pin

Number

Pin

Name

Type

Note

2-1

Description

7

TXP

I/O Physical transmit or receive signal (+ differential)

8

XO

O

Crystal feedback for 25 MHz crystal

This pin is a no connect if an oscillator or external clock source is used.

9

XI

I

Crystal/Oscillator/External Clock input

25 MHz ±50 ppm

10

REXT

I

Set PHY transmit output current

Connect a 6.49 kΩ resistor to ground on this pin.

11

MDIO

Ipu/

Opu

Management Interface (MII) Data I/O

This pin has a weak pull-up, is open-drain, and requires an external 1.0 kΩ

pull-up resistor.

12

MDC

Ipu

Management Interface (MII) Clock input

This clock pin is synchronous to the MDIO data pin.

MII mode: MII Receive Data Output[3] (Note 2-2)

13

RXD3/

PHYAD0

Ipu/O

Config mode: The pull-up/pull-down value is latched as PHYADDR[0] at the

de assertion of reset.

See the Strap-In Options - KSZ8051MNL section for details.

MII mode: MII Receive Data Output[2] (Note 2-2)

14

RXD2/

PHYAD1

Ipd/O

Config mode: The pull-up/pull-down value is latched as PHYADDR[1] at the

deassertion of reset.

See the Strap-In Options - KSZ8051MNL section for details.

MII mode: MII Receive Data Output[1] (Note 2-2)

15

RXD1/

PHYAD2

Ipd/O

Config mode: The pull-up/pull-down value is latched as PHYADDR[2] at the

de assertion of reset.

See the Strap-In Options - KSZ8051MNL section for details.

MII mode: MII Receive Data Output[0] (Note 2-2)

16

RXD0/

DUPLEX

Ipu/O

Config mode: The pull-up/pull-down value is latched as DUPLEX at the de-

assertion of reset.

See the Strap-In Options - KSZ8051MNL section for details.

17

VDDIO

P

3.3V, 2.5V, or 1.8V digital VDD

MII mode: MII Receive Data Valid output

18

RXDV/

CONFIG2

Ipd/O

Config mode: The pull-up/pull-down value is latched as CONFIG2 at the de-

assertion of reset.

See the Strap-In Options - KSZ8051MNL section for details.

MII mode: MII Receive Clock output

19

RXC/

B-CAST_OFF

Ipd/O

Config mode: The pull-up/pull-down value is latched as B-CAST_OFF at the

de assertion of reset.

See the Strap-In Options - KSZ8051MNL section for details.

MII mode: MII Receive Error output

20

RXER/ISO

Ipd/O

Config mode: The pull-up/pull-down value is latched as ISOLATE at the de-

assertion of reset.

See the Strap-In Options - KSZ8051MNL section for details.

DS00002310A-page 6

 2016 Microchip Technology Inc.

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