LAN9303 datasheet(32/366 Pages) SMSC

32 / 366 page

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

Datasheet

Revision 1.3 (08-27-09)

SMSC LAN9303/LAN9303i

DATASHEET

Table 3.5 GPIO/LED/Configuration Straps

NUM

PINS

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

LED 5

LED5

O12/

OD12/

OS12

This pin is configured to operate as an LED when

the LED 5 Enable bit of the LED Configuration

depends on the setting of the LED Function 1-0

(LED_FUN[1:0]) field in the LED Configuration

an push-pull or open-drain/open-source output.

When selected as an open-drain/open-source

output, the polarity of this pin depends upon the

PHYADDR_LED5P strap value sampled at reset.

GPIO 5

GPIO5

IS/O12/

OD12

(PU)

This pin is configured to operate as a GPIO when

the LED 5 Enable bit of the LED Configuration

programmable as either a push-pull output, an

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

writing the General Purpose I/O Configuration

I/O Data & Direction Register (GPIO_DATA_DIR).

PHY Address

and LED 5

Polarity

Configuration

Strap

PHYADDR_LED5P

(PU)

This strap configures the default value of the MII

management address for the PHYs and Virtual

PHY, as well as the polarity of the LED 5 pin when

it is an open-drain or open-source output. See

Note 3.6.

If the strap value is 0:

The PHY address values are as follows:

Virtual PHY = 0

PHY Port 1 = 1

PHY Port 2 = 2

The LED is set as active high, since it is assumed

that a LED to ground is used as the pull-down.

If the strap value is 1:

The PHY address values are as follows:

Virtual PHY = 1

PHY Port 1 = 2

PHY Port 2 = 3

The LED is set as active low, since it is assumed

that a LED to VDD is used as the pull-up.

LAN9303 Datasheet(PDF) 32 Page - SMSC Corporation

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