LAN9730 datasheet(23/222 Pages) MICROCHIP

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DS00001946A-page 23

LAN9730/LAN9730i

TABLE 2-5:

USB PINS

Num Pins

Name

Symbol

Buffer

Type

Description

HSIC Data

HSIC_DATA

HSIC

Bi-directional Double Data Rate (DDR) data sig-

nal that is synchronous to the HSIC_STROBE

signal as defined in the High-Speed Inter-Chip

USB Electrical Specification, Version 1.0.

HSIC Strobe

HSIC_STROBE

HSIC

Bi-directional data strobe signal as defined in the

High-Speed Inter-Chip USB Electrical Specifica-

tion, Version 1.0.

HSIC Slew

Tune

SLEW_TUNE

(PD)

Applies a 30% slew rate boost to the HSIC_DATA

and HSIC_STROBE pins when driven high.

External USB

Bias Resistor

USBRBIAS

Used for setting HS transmit current level and on-

chip termination impedance. Connect to an exter-

nal 12.0 kΩ 1.0% resistor to ground.

TABLE 2-6:

ETHERNET PHY PINS

Num Pins

Name

Symbol

Buffer

Type

Description

Ethernet TX

Data Out

Negative

TXN

AIO

The transmit data outputs may be swapped inter-

nally with receive data inputs when Auto-MDIX is

enabled.

Ethernet TX

Data Out

Positive

TXP

AIO

The transmit data outputs may be swapped inter-

nally with receive data inputs when Auto-MDIX is

enabled.

Ethernet RX

Data In Nega-

tive

RXN

AIO

The receive data inputs may be swapped inter-

nally with transmit data outputs when Auto-MDIX

is enabled.

Ethernet RX

Data In Posi-

tive

RXP

AIO

The receive data inputs may be swapped inter-

nally with transmit data outputs when Auto-MDIX

is enabled.

PHY Inter-

rupt (Internal

PHY Mode)

nPHY_INT

In Internal PHY Mode, this pin can be configured

to output the internal PHY interrupt signal.

Note:

The internal PHY interrupt signal is

active-high.

PHY Interrupt

(External

PHY Mode)

nPHY_INT

(PU)

In External PHY Mode, the active-low signal on

this pin is input from the external PHY and indi-

cates a PHY interrupt has occurred.

External PHY

Bias Resistor

EXRES

Used for the internal bias circuits. Connect to an

external 12.0 kΩ 1.0% resistor to ground.

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