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LAN8720AI Datasheet(PDF) 10 Page - SMSC Corporation

Part # LAN8720AI
Description  Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
PDF  79 Pages
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Manufacturer  SMSC [SMSC Corporation]
Direct Link  http://www.smsc.com
Logo SMSC - SMSC Corporation

LAN8720AI Datasheet(HTML) 10 Page - SMSC Corporation

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Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
Revision 1.4 (08-23-12)
10
SMSC LAN8720A/LAN8720Ai
DATASHEET
Table 2.1 RMII Signals
NUM PINS
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
1
Transmit
Data 0
TXD0
VIS
The MAC transmits data to the transceiver using
this signal.
1
Transmit
Data 1
TXD1
VIS
The MAC transmits data to the transceiver using
this signal.
1
Transmit
Enable
TXEN
VIS
(PD)
Indicates that valid transmission data is present
on TXD[1:0].
1
Receive
Data 0
RXD0
VO8
Bit 0 of the 2 data bits that are sent by the
transceiver on the receive path.
PHY
Operating
Mode 0
Configuration
Strap
MODE0
VIS
(PU)
Combined with MODE1 and MODE2, this
configuration strap sets the default PHY mode.
See Note 2.1 for more information on
configuration straps.
Note:
Refer to Section 3.7.2, "MODE[2:0]:
Mode Configuration," on page 31 for
additional details.
1
Receive
Data 1
RXD1
VO8
Bit 1 of the 2 data bits that are sent by the
transceiver on the receive path.
PHY
Operating
Mode 1
Configuration
Strap
MODE1
VIS
(PU)
Combined with MODE0 and MODE2, this
configuration strap sets the default PHY mode.
See Note 2.1 for more information on
configuration straps.
Note:
Refer to Section 3.7.2, "MODE[2:0]:
Mode Configuration," on page 31 for
additional details.
1
Receive Error
RXER
VO8
This signal is asserted to indicate that an error
was detected somewhere in the frame presently
being transferred from the transceiver.
PHY Address
0
Configuration
Strap
PHYAD0
VIS
(PD)
This configuration strap sets the transceiver’s
SMI address.
See Note 2.1 for more information on
configuration straps.
Note:
Refer to Section 3.7.1, "PHYAD[0]: PHY
Address Configuration," on page 31 for
additional information.



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