LAN8720i SMSC [SMSC Corporation], LAN8720i Datasheet - Page 28
LAN8720i
Manufacturer Part Number
LAN8720i
Description
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.LAN8720I.pdf
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Revision 1.0 (05-28-09)
accepting 50MHz
REF_CLK
Capable of
MAC
clock
nINT not available in this
configuration
In some system architectures, a 25MHz clock source is available. The LAN8720 can be used to
generate the REF_CLK to the MAC as shown in
Interface
RMII
Figure 4.5 LAN8720 sources REF_CLK from a 25MHz crystal
2
2
2
MDIO
MDC
TXD[1:0]
TXEN
RXD[1:0]
CRS_DV
RXER
REFCLKO
LED[2:1]
nRST
DATASHEET
10/100 PHY
LAN8720
24-QFN
RMII
28
Figure
XTAL1/CLKIN
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
XTAL2
4.6. It is important to note that in this specific
RXN
RXP
TXP
TXN
Mag
25MHz
SMSC LAN8720/LAN8720i
RJ45
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