LAN9313 Datasheet, PDF (30/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

PIN
122,125
Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
Table 3.3 LAN Port 1 & 2 Power and Common Pins (continued)
NAME
+3.3V Port 2
Analog Power
Supply
SYMBOL
VDD33A2
BUFFER
TYPE
DESCRIPTION
P
+3.3V Port 2 Analog Power Supply
Refer to the LAN9313/LAN9313i application note
for additional connection information.
+3.3V Master VDD33BIAS
Bias Power
120
Supply
P
+3.3V Master Bias Power Supply
Refer to the LAN9313/LAN9313i application note
for additional connection information.
Port 2
VDD18TX2
Transmitter
+1.8V Power
121
Supply
P
Port 2 Transmitter +1.8V Power Supply: This pin
is supplied from the internal PHY voltage regulator.
This pin must be tied to the VDD18TX1 pin for
proper operation.
Refer to the LAN9313/LAN9313i application note
for additional connection information.
Port 1
VDD18TX1
Transmitter
118
+1.8V Power
Supply
P
+1.8V Port 1 Transmitter Power Supply: This pin
must be connected directly to the VDD18TX2 pin
for proper operation.
Refer to the LAN9313/LAN9313i application note
for additional connection information.
PIN
NAME
MII Transmit
Data
19,20,22,23
MII
Transmitter
Enable
4
Table 3.4 LAN Port 0(External MII) Pins
SYMBOL
TXD[3:0]
BUFFER
TYPE
DESCRIPTION
IS/O8
(PD)
Note 3.3
MII Transmit Data: The functionality of these
signals is dependant on the mode of the
LAN9313/LAN9313i:
„ In MAC mode, this is the data from the
LAN9313/LAN9313i switch to an external PHY.
See Note 3.3.
TXEN
„ In PHY mode, this is the data from an external
MAC to the LAN9313/LAN9313i switch.
IS/O8
(PD)
Note 3.3
MII Transmit Enable: Indicates valid data on
TXD[3:0].
„ In MAC mode, this signal is output to an external
PHY. See Note 3.3.
„ In PHY mode, this signal is input from an external
MAC.
Revision 1.2 (04-08-08)
30
DATASHEET
SMSC LAN9313/LAN9313i