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LAN8720AI
SMSC -> Microchip
LAN8720AI Datasheet PDF : 79 Pages
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Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
Table 2.2 LED Pins (continued)
NUM PINS
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
LED 2
LED2
nINT/
nINTSEL
REFCLKO
Function
Select
1
Configuration
Strap
O12
IS
(PU)
Link Speed LED Indication. This pin is driven
active when the operating speed is 100Mbps. It
is inactive when the operating speed is 10Mbps
or during line isolation.
Note: Refer to Section 3.8.1, "LEDs," on
page 37 for additional LED information.
This configuration strap selects the mode of the
nINT/REFCLKO pin.
When nINTSEL is floated or pulled to VDD2A,
nINT is selected for operation on the
nINT/REFCLKO pin (default).
When nINTSEL is pulled low to VSS,
REFCLKO is selected for operation on the
nINT/REFCLKO pin.
See Note 2.2 for more information on
configuration straps.
Note:
Refer to See Section 3.8.1.2, "nINTSEL
and LED2 Polarity Selection," on
page 37 for additional information.
Note 2.2
Configuration strap values are latched on power-on reset and system reset. Configuration
straps are identified by an underlined symbol name. Signals that function as configuration
straps must be augmented with an external resistor when connected to a load. Refer to
Section 3.7, "Configuration Straps," on page 31 for additional information.
Table 2.3 Serial Management Interface (SMI) Pins
NUM PINS
1
1
NAME
SMI Data
Input/Output
SMI Clock
SYMBOL
MDIO
MDC
BUFFER
TYPE
DESCRIPTION
VIS/
VOD8
Serial Management Interface data input/output
VIS
Serial Management Interface clock
NUM PINS
1
1
NAME
Ethernet
TX/RX
Positive
Channel 1
Ethernet
TX/RX
Negative
Channel 1
Revision 1.4 (08-23-12)
Table 2.4 Ethernet Pins
SYMBOL
TXP
BUFFER
TYPE
DESCRIPTION
AIO
Transmit/Receive Positive Channel 1
TXN
AIO
Transmit/Receive Negative Channel 1
12
DATASHEET
SMSC LAN8720A/LAN8720Ai
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