LAN7431 datasheet(65/77 Pages) MICROCHIP

Part #	LAN7431

Description	Low Power PCIe to Gigabit Ethernet Controller with Integrated Ethernet MAC / PHY

PDF	77 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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 2018-2019 Microchip Technology Inc.

DS00002631D-page 65

LAN7430/LAN7431

7.6.7

MDIO INTERFACE TIMING (LAN7431 ONLY)

This section specifies the LAN7431 MDIO interface timing.

Note 7-41

The MDIO Interface outputs a nominal 400 ns clock with a 50/50 duty cycle.

Note 7-42

The MDIO Interface changes output data a nominal 120 ns following the rising edge of MDC.

Note 7-43

The MDIO Interface samples input data a nominal 40 ns prior to the rising edge of MDC.

FIGURE 7-12:

MDIO INTERFACE TIMING

TABLE 7-20:

MDIO INTERFACE TIMING VALUES

Symbol

Description

Min

Max

Units

Notes

tclkp

MDC period

400

Note 7-41

tclkh

MDC high time

180 (90%)

Note 7-41

tclkl

MDC low time

180 (90%)

Note 7-41

tval

MDIO (write to PHY) output valid from rising

edge of MDC

250

Note 7-42

tohold

MDIO (write to PHY) output hold from rising

edge of MDC

Note 7-42

tsu

MDIO (read from PHY) input setup time to rising

edge of MDC

Note 7-43

tihold

MDIO (read from to PHY) input hold time after

rising edge of MDC

Note 7-43

MDC

MDIO

tclkh

tclkl

tclkp

tohold

MDIO

tsu tihold

(Data-Out)

(Data-In)

tohold

tval

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