LAN88730AM-C datasheet(9/82 Pages) MICROCHIP

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DS60001256B-page 9

LAN88730

Note 1: Configuration strap values are latched on power-on reset and system reset. Configuration straps are iden-

tified by an underlined symbol name. Signals that function as configuration straps must be augmented with

an external resistor when connected to a load. Refer to Section 3.7, "Configuration Straps" for additional

information.

Receive Clock

(MII Mode)

RXCLK

VO8

In MII mode, this pin is the receive clock output.

• MII (100BASE-TX): 25 MHz

• MII (10BASE-T): 2.5 MHz

PHY Address 1

Configuration

Strap

PHYAD1

VIS

(PD)

Combined with PHYAD0 and PHYAD2, this config-

uration strap sets the transceiver’s SMI address.

See Note 1 for more information on configuration

straps.

Note:

Refer to Section 3.7.1, "PHYAD[2:0]:

PHY Address Configuration" for addi-

tional information.

Receive Data

Valid

RXDV

VO8

Indicates that recovered and decoded data is avail-

able on the RXD pins.

Collision Detect

(MII Mode)

COL

VO8

This signal is asserted to indicate detection of a

collision condition in MII mode.

Carrier Sense /

Receive Data

Valid

(RMII Mode)

CRS_DV

VO8

This signal is asserted to indicate the receive

medium is non-idle in RMII mode. When a

10BASE-T packet is received, CRS_DV is

asserted, but RXD[1:0] is held low until the SFD

byte (10101011) is received.

Note:

Per the RMII standard, transmitted data

is not looped back onto the receive data

pins in 10BASE-T half-duplex mode.

PHY Operat-

ing Mode 2

Configuration

Strap

MODE2

VIS

(PU)

Combined with MODE0 and MODE1, this configu-

ration strap sets the default PHY mode.

See Note 1 for more information on configuration

straps.

Note:

Refer to Section 3.7.2, "MODE[2:0]:

Mode Configuration" for additional

details.

Carrier Sense

(MII Mode)

CRS

VO8

(PD)

This signal indicates detection of a carrier in MII

mode.

TABLE 2-1:

MII/RMII SIGNALS (CONTINUED)

Num Pins

Name

Symbol

Buffer Type

Description

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