®
Small Footprint MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR Technology
Datasheet
Table 2.1 MII/RMII Signals
BUFFER
NUM PINS
NAME
SYMBOL
TYPE
DESCRIPTION
Transmit
Data 0
TXD0
VIS
The MAC transmits data to the transceiver using
this signal in all modes.
1
Transmit
Data 1
TXD1
TXD2
VIS
VIS
The MAC transmits data to the transceiver using
this signal in all modes.
1
1
Transmit
Data 2
(MII Mode)
The MAC transmits data to the transceiver using
this signal in MII Mode.
Note:
This signal must be grounded in RMII
Mode.
Transmit
Data 3
(MII Mode)
TXD3
nINT
VIS
The MAC transmits data to the transceiver using
this signal in MII Mode.
1
Note:
This signal must be grounded in RMII
Mode.
Interrupt
Output
VO8
Active low interrupt output. Place an external
resistor pull-up to VDDIO.
Note:
Refer to Section 3.6, "Interrupt
Management," on page 34 for additional
details on device interrupts.
Note:
Refer to Section 3.8.1.2, "nINTSEL and
LED2 Polarity Selection," on page 39 for
details on how the nINTSEL
configuration strap is used to determine
the function of this pin.
1
Transmit
Error
(MII Mode)
TXER
TXD4
VIS
(PU)
When driven high, the 4B/5B encode process
substitutes the Transmit Error code-group (/H/)
for the encoded data word. This input is ignored
in the 10BASE-T mode of operation.
Transmit
Data 4
(MII Mode)
VIS
(PU)
In Symbol Interface (5B Decoding) mode, this
signal becomes the MII Transmit Data 4 line (the
MSB of the 5-bit symbol code-group).
Note:
This signal is not used in RMII Mode.
Transmit
Enable
TXEN
VIS
(PD)
Indicates that valid transmission data is present
on TXD[3:0]. In RMII Mode, only TXD[1:0]
provide valid data.
1
1
Transmit
Clock
(MII Mode)
TXCLK
VO8
Used to latch data from the MAC into the
transceiver.
MII (100BASE-TX): 25MHz
MII (10BASE-T): 2.5MHz
Note:
This signal is not used in RMII Mode.
Revision 1.4 (08-23-12)
10
SMSC LAN8710A/LAN8710Ai
DATASHEET
SMSC [ SMSC CORPORATION ]
