lan8720 Standard Microsystems Corp., lan8720 Datasheet - Page 56

• Manufacturer Part Number: lan8720
• Description: Small Footprint Rmii 10/100 Ethernet Transceiver With Hp Auto-mdix Support
• Manufacturer: Standard Microsystems Corp.

Revision 1.0 (04-15-09)
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
Datasheet