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LAN8700

±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWR™ in a Small Footprint

SMSC -> Microchip 

±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWRTM in a Small Footprint

Datasheet

Table 3.1 MII Signals (continued)

SIGNAL NAME

RXD0/

MODE0

RXD1/

MODE1

RXD2/

MODE2

RXD3/

nINTSEL

RX_ER/

RXD4/

RX_DV

TYPE

I/O

I/O

I/O

I/O

O

O

DESCRIPTION

Receive Data 0: Bit 0 of the 4 data bits that are sent by the PHY

in the receive path.

PHY Operating Mode Bit 0: set the default MODE of the PHY.

Note: See Section 5.4.9.2, "Mode Bus – MODE[2:0]," on

page 52, for the MODE options

Receive Data 1: Bit 1 of the 4 data bits that are sent by the PHY

in the receive path.

PHY Operating Mode Bit 1: set the default MODE of the PHY.

Note: See Section 5.4.9.2, "Mode Bus – MODE[2:0]," on

page 52, for the MODE options.

Receive Data 2: Bit 2 of the 4 data bits that are sent by the PHY

in the receive path.

PHY Operating Mode Bit 2: set the default MODE of the PHY.

Notes:

„ RXD2 is not used in RMII Mode.

„ See Section 5.4.9.2, "Mode Bus – MODE[2:0]," on page 52, for

the MODE options.

Receive Data 3: Bit 3 of the 4 data bits that are sent by the PHY

in the receive path.

nINTSEL: On power-up or external reset, the mode of the

nINT/TXER/TXD4 pin is selected.

„ When RXD3/nINTSEL is floated or pulled to VDDIO, nINT is

selected for operation on pin nINT/TXER/TXD4 (default).

„ When RXD3/nINTSEL is pulled low to VSS through a resistor,

(see Table 4.3, “Boot Strapping Configuration Resistors,” on

page 32), TXER/TXD4 is selected for operation on pin

nINT/TXER/TXD4.

Notes:

„ RXD3 is not used in RMII Mode

„ If the nINT/TXER/TXD4 pin is configured for nINT mode,

then a pull-up resistor is needed to VDDIO on the

nINT/TXER/TXD4 pin. see Table 4.3, “Boot Strapping

Configuration Resistors,” on page 32.

„ See Section 4.10, "nINT/TX_ER/TXD4 Strapping," on page 30

for additional information on configuration/strapping options.

Receive Error: Asserted to indicate that an error was detected

somewhere in the frame presently being transferred from the

PHY.

MII Receive Data 4: In Symbol Interface (5B Decoding) mode,

this signal is the MII Receive Data 4 signal, the MSB of the

received 5-bit symbol code-group. Unless configured in this

mode, the pin functions as RX_ER.

Note: The RX_ER signal is optional in RMII Mode.

Receive Data Valid: Indicates that recovered and decoded data

nibbles are being presented on RXD[3:0].

Note: This signal is not used in RMII Mode.

SMSC LAN8700/LAN8700I

13

DATASHEET

Revision 1.0 (02-09-07)

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