LAN8720 データシートの表示（PDF） - SMSC -> Microchip
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LAN8720 Datasheet PDF : 79 Pages
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Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
NUM PINS
NAME
1
Transmit
Data 0
1
Transmit
Data 1
1
Transmit
Enable
Receive
Data 0
PHY
Operating
1
Mode 0
Configuration
Strap
Receive
Data 1
PHY
Operating
1
Mode 1
Configuration
Strap
Receive Error
PHY Address
0
1
Configuration
Strap
Table 2.1 RMII Signals
SYMBOL
TXD0
TXD1
TXEN
RXD0
MODE0
RXD1
MODE1
RXER
PHYAD0
BUFFER
TYPE
DESCRIPTION
VIS
The MAC transmits data to the transceiver using
this signal.
VIS
The MAC transmits data to the transceiver using
this signal.
VIS
(PD)
VO8
Indicates that valid transmission data is present
on TXD[1:0].
Bit 0 of the 2 data bits that are sent by the
transceiver on the receive path.
VIS
(PU)
VO8
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.
Bit 1 of the 2 data bits that are sent by the
transceiver on the receive path.
VIS
(PU)
VO8
VIS
(PD)
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.
This signal is asserted to indicate that an error
was detected somewhere in the frame presently
being transferred from the transceiver.
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.
Revision 1.4 (08-23-12)
10
DATASHEET
SMSC LAN8720A/LAN8720Ai
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