LAN9500AI datasheet(20/66 Pages) SMSC

20 / 66 page

USB 2.0 to 10/100 Ethernet Controller

Datasheet

Revision 1.1 (04-18-13)

SMSC LAN950x Family

DATASHEET

Ethernet

Speed

Indicator LED

nSPD_LED

OD12

(PU)

This pin is driven low (LED on) when the Ethernet

operating speed is 100Mbs, or during auto-

negotiation. This pin is driven high during 10Mbs

operation, or during line isolation.

General

Purpose I/O

GPIO10

IS/O12/

OD12

(PU)

This General Purpose I/O pin is fully

programmable as either a push-pull output, an

open-drain output, or a Schmitt-triggered input.

Note:

(LAN9500A/LAN9500Ai only)

This pin may serve as a wakeup pin

whose detection mode is selectable

when External PHY and PME modes of

operation are in effect. Refer to

Chapter 6, "PME Operation," on

page 41 for additional information.

Note:

By default this pin is configured as a

GPIO.

Detect

Upstream

VBUS Power

VBUS_DET

IS_5V

(PD)

Detects state of upstream bus power.

For bus powered applications, this pin must be

tied to VDD33IO.

For self powered applications where the device is

permanently attached to a host, VBUS_DET

should be pulled to VDD33IO. For other self

powered applications, refer to the device

reference schematic for additional connection

information.

Note:

(LAN9500A/LAN9500Ai only)

This pin may be used to signal bus

power availability when PME mode of

operation is in effect. Refer to

Chapter 6, "PME Operation," on

page 41 for additional information.

Test 1

TEST1

This pin must always be connected to VDD33IO

for proper operation.

Test 2

TEST2

This pin must always be connected to VSS for

proper operation.

Test 3

TEST3

This pin must always be connected to VSS for

proper operation.

Table 3.4 Miscellaneous Pins (continued)

NUM PINS

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

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