LAN8710AI datasheet(10/82 Pages) SMSC

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Small Footprint MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology

Datasheet

Revision 1.4 (08-23-12)

SMSC LAN8710A/LAN8710Ai

DATASHEET

Table 2.1 MII/RMII Signals

NUM PINS

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

Transmit

Data 0

TXD0

VIS

The MAC transmits data to the transceiver using

this signal in all modes.

Transmit

Data 1

TXD1

VIS

The MAC transmits data to the transceiver using

this signal in all modes.

Transmit

Data 2

(MII Mode)

TXD2

VIS

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

VIS

The MAC transmits data to the transceiver using

this signal in MII Mode.

Note:

This signal must be grounded in RMII

Mode.

Interrupt

Output

nINT

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.

Transmit

Error

(MII Mode)

TXER

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)

TXD4

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.

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.

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