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LAN8740 Datasheet(PDF) 121 Page - Microchip Technology

Part # LAN8740
Description  Small Footprint MII/RMII 10/100 Energy Efficient Ethernet Transceiver with HP Auto-MDIX and flexPWR짰 Technology
PDF  136 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN8740 Datasheet(HTML) 121 Page - Microchip Technology

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2013-2015 Microchip Technology Inc.
DS00001987A-page 121
LAN8740A/LAN8740Ai
5.6.3.1
100 Mbps Internal Loopback MII Timing
FIGURE 5-5:
100 MBPS INTERNAL LOOPBACK MII TIMING
TABLE 5-11:
100 MBPS INTERNAL LOOPBACK MII TIMING VALUES
Symbol
Description
Min.
Typ.
Max.
Unit
t1
TXCLK rising edge after TXEN assertion to
RXDV assertion
(100 Mbps internal loopback MII mode)
160
161
162
ns
Note:
The t1 measurement applies in MII mode when the Loopback bit of the Basic Control Register is set to “1”
and a link has been established in 100 Mb full-duplex mode. The t1 measurement is taken from the first
rising edge of TXCLK following assertion of TXEN to the rising edge of RXDV.
TXCLK
(OUTPUT)
RXD[3:0]
(OUTPUTS)
TXEN
(INPUT)
t1
RXDV
(OUTPUT)



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