lan9303m Standard Microsystems Corp., lan9303m Datasheet - Page 24

• Manufacturer Part Number: lan9303m
• Description: Small Form Factor Three Port 10/100 Managed Ethernet Switch With Dual Mii/rmii/turbo Mii
• Manufacturer: Standard Microsystems Corp.

Revision 1.3 (08-27-09)
3.2
PINS
PINS
NUM
NUM
1
1
1
1
1
1
1
1
Port 1 Ethernet
Port 1 Ethernet
Port 1 Ethernet
Port 1 Ethernet
Port 2 Ethernet
Port 2 Ethernet
Port 2 Ethernet
Port 2 Ethernet
RX Negative
RX Negative
TX Negative
TX Negative
RX Positive
RX Positive
TX Positive
TX Positive
This section contains the descriptions of the device pins. The pin descriptions have been broken into
functional groups as follows:
Note: A list of buffer type definitions is provided in
Note: Please refer to the LAN9303M/LAN9303Mi Reference Schematic and LANCheck Schematic
Note 3.1
Pin Descriptions
NAME
NAME
LAN Port 1 Pins
LAN Port 2 Pins
LAN Port 1 & 2 Power and Common Pins
Port 1 MII/RMII Pins
Port 0 MII/RMII Pins
GPIO/LED/Configuration Straps
Serial Management/EEPROM Pins
Miscellaneous Pins
PLL Pins
Core and I/O Power and Ground Pins
Checklist on the SMSC website for additional connection information.
The pin names for the twisted pair pins apply to a normal connection. If HP Auto-MDIX is
enabled and a reverse connection is detected or manually selected, the RX and TX pins
will be swapped internally.
SYMBOL
SYMBOL
RXN1
RXP1
RXN2
RXP2
TXN1
TXP1
TXN2
TXP2
Table 3.1 LAN Port 1 Pins
Table 3.2 LAN Port 2 Pins
Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII
DATASHEET
BUFFER
BUFFER
TYPE
TYPE
AIO
AIO
AIO
AIO
AIO
AIO
AIO
AIO
24
Negative output of Port 1 Ethernet transmitter. See
Note
Positive output of Port 1 Ethernet transmitter. See
Note
Negative input of Port 1 Ethernet receiver. See
Note
Positive input of Port 1 Ethernet receiver. See
Note
Negative output of Port 2 Ethernet transmitter. See
Note
Positive output of Port 2 Ethernet transmitter. See
Note
Negative input of Port 2 Ethernet receiver. See
Note
Positive input of Port 2 Ethernet receiver. See
Note
Section 3.3, "Buffer Types," on page
3.1.
3.1.
3.1.
3.1.
3.2.
3.2.
3.2.
3.2.
DESCRIPTION
DESCRIPTION
SMSC LAN9303M/LAN9303Mi
47.
Datasheet