LAN8808D datasheet(15/80 Pages) MICROCHIP

15 / 80 page

LAN8808D

DS00005833C-page 15

Ethernet Port 3

TX/RX Negative

Channel C

TX_RXN_C_3

AIO

Port 3 Channel C negative signal of differential pair

Ethernet Port 3

TX/RX Positive

Channel D

TX_RXP_D_3

AIO

Port 3 Channel D positive signal of differential pair

Ethernet Port 3

TX/RX Negative

Channel D

TX_RXN_D_3

AIO

Port 3 Channel D negative signal of differential pair

TABLE 3-3:

QSGMII INTERFACE PINS

Name

Symbol

Buffer

Type

Description

QSGMII Transmit-

ter Output Positive

QSGMII_TXP

QSGMII PHY to MAC positive signal of differential pair

QSGMII Transmit-

ter Output Nega-

tive

QSGMII_TXN

QSGMII PHY to MAC negative signal of differential pair

QSGMII Receiver

Input Positive

QSGMII_RXP

QSGMII MAC to PHY positive signal of differential pair

QSGMII Receiver

Input Negative

QSGMII_RXN

QSGMII MAC to PHY negative signal of differential pair

TABLE 3-4:

SYSTEM CLOCK PINS

Name

Symbol

Buffer

Type

Description

System

Reference Clock

Input

ICLK

The System Reference Clock can be input from XI (25 MHz

single-ended) or CK125_REF_INP/M (125 MHz differential) as

determined by REF_CLK_SEL1. Refer to REF_CLK_SEL1 for

additional information.

125 MHz differential clock reference is recommended for best

QSGMII performance.

System

Reference Clock

Input Positive

CK125_REF_INP

LVDS1

The System Reference Clock can be input from XI (25 MHz

single-ended) or CK125_REF_INP/M (125 MHz differential) as

determined by REF_CLK_SEL1. Refer to REF_CLK_SEL1 for

additional information.

125 MHz differential clock reference is recommended for best

QSGMII performance.

System

Reference Clock

Input Negative

CK125_REF_INM

LVDS1

The System Reference Clock can be input from XI (25 MHz

single-ended) or CK125_REF_INP/M (125 MHz differential) as

determined by REF_CLK_SEL1. Refer to REF_CLK_SEL1 for

additional information.

125 MHz differential clock reference is recommended for best

QSGMII performance.

TABLE 3-2:

ETHERNET MEDIA INTERFACE PINS (CONTINUED)

Name

Symbol

Buffer

Type

Description

LAN8808D Datasheet(PDF) 15 Page - Microchip Technology

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