SMSC LAN9514 Manual Do Utilizador
USB Hub with Integrated 10/100 Ethernet Controller
Datasheet
Revision 1.0 (04-20-09)
14
SMSC LAN9514
DATASHEET
Note 2.1
Exposed pad on package bottom (
).
Table 2.5 Ethernet PHY Pins
NUM
PINS
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
1
Ethernet TX
Data Out
Negative
TXN
AIO
Negative output of the Ethernet transmitter. The
transmit data outputs may be swapped internally
with receive data inputs when Auto-MDIX is
enabled.
1
Ethernet TX
Data Out
Positive
TXP
AIO
Positive output of the Ethernet transmitter. The
transmit data outputs may be swapped internally
with receive data inputs when Auto-MDIX is
enabled.
1
Ethernet RX
Data In
Negative
RXN
AIO
Negative input of the Ethernet receiver. The receive
data inputs may be swapped internally with
transmit data outputs when Auto-MDIX is enabled.
1
Ethernet RX
Data In Positive
RXP
AIO
Positive input of the Ethernet receiver. The receive
data inputs may be swapped internally with
transmit data outputs when Auto-MDIX is enabled.
7
+3.3V Analog
Power Supply
VDD33A
P
Refer to the LAN9514 reference schematics for
connection information.
1
External PHY
Bias Resistor
EXRES
AI
Used for the internal bias circuits. Connect to an
external 12.4K 1.0% resistor to ground.
1
Ethernet PLL
+1.8V Power
Supply
VDD18ETHPLL
P
Refer to the LAN9514 reference schematics for
additional connection information.
Table 2.6 I/O Power Pins, Core Power Pins, and Ground Pad
NUM
PINS
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
5
+3.3V I/O
Power
VDD33IO
P
+3.3V Power Supply for I/O Pins.
Refer to the LAN9514 reference schematics for
connection information.
2
Digital Core
+1.8V Power
Supply Output
VDD18CORE
P
+1.8 V power from the internal core voltage
regulator. All VDD18CORE pins must be tied
together for proper operation.
Refer to the LAN9514 reference schematics for
connection information.
1
Ground
VSS
P
Ground