LAN8810 datasheet(69/83 Pages) MICROCHIP

Part #	LAN8810

Description	GMII 10/100/1000 Ethernet Transceiver

PDF	83 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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69 / 83 page

LAN8810/LAN8810I

DS00001870B-page 69

 2009-2015 Microchip Technology Inc.

Note 5-1

Min/max limits are non-sustainable long term.

Note 5-2

tr and tf are measured from VIL_AC(Max)=0.7V to VIH_AC(Min)=1.9V.

Note:

All GMII timing specifications assume a point-to-point test circuit as defined in Section 35.4.2.2 of the IEEE

802.3-2005 specification.

FIGURE 5-5:

GMII TRANSMIT TIMING

TABLE 5-14:

GMII TRANSMIT TIMING VALUES

Symbol

Description

Min

Max

Units

Notes

fgtxclk

GTXCLK Frequency

125 -

100ppm

125 +

100ppm

MHz

tclkp

GTXCLK period

7.5

8.5

Note 5-1

tclkh

GTXCLK high time

2.5

tclkl

GTXCLK low time

2.5

tval

TXD[7:0], TXEN, TXER setup time to rising

edge of GTXCLK

2.0

thold

TXD[7:0], TXEN, TXER hold time after rising

edge of GTXCLK

0.0

GTXCLK rise time

Note 5-2

GTXCLK fall time

Note 5-2

GTXCLK

TXD[7:0],

TXEN, TXER

tclkh

tclkl

tclkp

thold

tval

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