LAN9303MI-AKZE Datasheet, PDF (38/386 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII
Datasheet
Note 3.7 An external supplemental pull-up may be needed, depending upon the input current
loading of the external MAC/PHY device.
Table 3.6 GPIO/LED/Configuration Straps
NUM
PINS
1
NAME
LED 5
GPIO 5
PHY Address
and LED 5
Polarity
Configuration
Strap
SYMBOL
BUFFER
TYPE
DESCRIPTION
LED5
O12/
OD12/
OS12
This pin is configured to operate as an LED when
the LED 5 Enable bit of the LED Configuration
Register (LED_CFG) is set. The buffer type
depends on the setting of the LED Function 1-0
(LED_FUN[1:0]) field in the LED Configuration
Register (LED_CFG) and is configured to be either
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.
GPIO5
IS/O12/
OD12
(PU)
This pin is configured to operate as a GPIO when
the LED 5 Enable bit of the LED Configuration
Register (LED_CFG) is clear. The pin is fully
programmable as either a push-pull output, an
open-drain output, or a Schmitt-triggered input by
writing the General Purpose I/O Configuration
Register (GPIO_CFG) and the General Purpose
I/O Data & Direction Register (GPIO_DATA_DIR).
PHYADDR_LED5P
IS
(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 3.8.
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.
Revision 1.5 (07-08-11)
38
DATASHEET
SMSC LAN9303M/LAN9303Mi