SMSC LAN9500i Manual De Usuario
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.
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.
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.
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.
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.
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)
(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.
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)
(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.
pin provides the management data to/from the
external PHY.
General
Purpose I/O 1
(Internal PHY
Mode Only)
GPIO1
IS/O8/
OD8
(PU)
(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.
pin outputs the management clock to the external
PHY.
General
Purpose I/O 2
(Internal PHY
Mode Only)
GPIO2
IS/O8/
OD8
(PU)
(PU)
General Purpose I/O 2