LAN8720i SMSC [SMSC Corporation], LAN8720i Datasheet - Page 56
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
(79 pages)
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Revision 1.0 (05-28-09)
6.2
6.2.1
6.2.1.1
PARAMETER
T6.1
Data Out -
RXD[1:0]
Clock In -
CRS_DV
CLKIN
The 50MHz REF_CLK IN timing applies to the case when nINTSEL is floated or pulled-high on the
LAN8720. In this mode, a 50MHz clock must be provided to the LAN8720 CLKIN pin. For more
information on REF_CLK IN Mode, see
RMII 100Base-T TX/RX Timings (50MHz REF_CLK IN)
100M RMII Receive Timing (50MHz REF_CLK IN)
RMII 10/100Base-TX/RX Timings (50MHz REF_CLK IN)
Output delay from rising edge of
CLKIN to receive signals output
valid
CLKIN frequency
Figure 6.2 100M RMII Receive Timing Diagram (50MHz REF_CLK IN)
Table 6.2 100M RMII Receive Timing Values (50MHz REF_CLK IN)
DESCRIPTION
T
DATASHEET
6.1
Section
56
MIN
3
4.7.1.
Valid Data
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
TYP
50
MAX
10
UNITS
MHz
ns
SMSC LAN8720/LAN8720i
NOTES
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