LAN7430 datasheet(17/77 Pages) MICROCHIP

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DS00002631D-page 17

LAN7430/LAN7431

Ethernet TX/RX

Negative

Channel C

TXRXM_C

AIO

Media Dependent Interface[2], negative signal of differen-

tial pair

1000BT mode: TXRXM_C corresponds to BI_DC- for

MDI configuration and BI_DD- for MDI-X configuration,

respectively.

10BT/100BT mode: TXRXM_C is not used.

Ethernet TX/RX

Positive

Channel D

TXRXP_D

AIO

Media Dependent Interface[3], positive signal of differen-

tial pair

1000BT mode: TXRXP_D corresponds to BI_DD+ for

MDI configuration and BI_DC+ for MDI-X configuration,

respectively.

10BT/100BT mode: TXRXP_D is not used.

Ethernet TX/RX

Negative

Channel D

TXRXM_D

AIO

Media Dependent Interface[3], negative signal of differen-

tial pair

1000BT mode: TXRXM_D corresponds to BI_DD- for

MDI configuration and BI_DC- for MDI-X configuration,

respectively.

10BT/100BT mode: TXRXM_D is not used.

External Gigabit Ethernet PHY RGMII (LAN7431 only)

Transmit Data

TXD3

TXD2

TXD1

TXD0

RGMII_O The MAC transmits data to the external Ethernet PHY

using these signals.

Transmit Control

TX_CTL

RGMII_O Indicates both the transmit data enable (TXEN) and

transmit error (TXER) functions per the RGMII specifica-

tion.

RGMII Transmit

Clock

TXC

RGMII_O Used to latch data from the MAC into the external Ether-

net PHY in RGMII mode.

1000BASE-T: 125MHz

100BASE-TX: 25MHz

10BASE-T: 2.5MHz

Receive Data

RXD3

RXD2

RXD1

RXD0

RGMII_I

The external Ethernet PHY transfers data to the MAC

using these signals.

Receive Control

RX_CTL

RGMII_I

Indicates both the receive data valid (RXDV) and receive

error (RXER) functions per the RGMII specification.

RGMII Receive

Clock

RXC

RGMII_I

Used to transfer data from the external Ethernet PHY to

the MAC in RGMII mode.

1000BASE-T: 125MHz

100BASE-TX: 25MHz

10BASE-T: 2.5MHz

25 MHz Refer-

ence Clock

REFCLK_25

VO12

25 MHz reference clock to be provided to and used as a

reference by the external Gigabit Ethernet PHY.

TABLE 3-3:

PIN DESCRIPTIONS (CONTINUED)

Name

Symbol

Buffer

Type

Description

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