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Hi-Speed USB 2.0 to 10/100 Ethernet Controller
Datasheet
Revision 1.7 (10-02-08) 10 SMSC LAN9500/LAN9500i
DATASHEET
Table 2.1 MII Interface Pins
NUM PINS NAME SYMBOL
BUFFER
TYPE DESCRIPTION
1
Receive Error
(External
PHY Mode)
RXER IS
(PD)
Receive Error: In external PHY mode, the signal
on this pin is input from the external PHY and
indicates a receive error in the packet. In internal
PHY mode, this pin is not used.
1
Transmit
Enable
(External
PHY Mode)
TXEN O8
(PD)
Transmit Enable: In external PHY mode, this pin
output to the external PHY and indicates valid
data on TXD[3:0]. In internal PHY mode, this pin
is not used.
1
Receive Data
Valid
(External
PHY Mode)
RXDV IS
(PD)
Receive Data Valid: In external PHY mode, the
signal on this pin is input from the external PHY
and indicates valid data on RXD[3:0]. In internal
PHY mode, this pin is not used.
1
Receive
Clock
(External
PHY Mode)
RXCLK IS
(PD)
Receive Clock: In external PHY mode, this pin
is the receiver clock input from the external PHY.
In internal PHY mode, this pin is not used.
1
Carrier Sense
(External
PHY Mode)
CRS IS
(PD)
Carrier Sense: In external PHY mode, the signal
on this pin is input from the external PHY and
indicates a network carrier.
General
Purpose I/O 3
(Internal PHY
Mode Only)
GPIO3 IS/O8/
OD8
(PU)
General Purpose I/O 3
1
MII Collision
Detect
(External
PHY Mode)
COL IS
(PD)
MII Collision Detect: In external PHY mode, the
signal on this pin is input from the external PHY
and indicates a collision event.
General
Purpose I/O 0
(Internal PHY
Mode Only)
GPIO0 IS/O8/
OD8
(PU)
General Purpose I/O 0
1
Management
Data
(External
PHY Mode)
MDIO IS/O8
(PD)
Management Data: In external PHY mode, this
pin provides the management data to/from the
external PHY.
General
Purpose I/O 1
(Internal PHY
Mode Only)
GPIO1 IS/O8/
OD8
(PU)
General Purpose I/O 1
1
Management
Clock
(External
PHY Mode)
MDC O8
(PD)
Management Clock: In external PHY mode, this
pin outputs the management clock to the external
PHY.
General
Purpose I/O 2
(Internal PHY
Mode Only)
GPIO2 IS/O8/
OD8
(PU)
General Purpose I/O 2