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Datasheet – SMSC FlexPWR LAN8720 User Manual

Page 59

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Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support

Datasheet

SMSC LAN8720/LAN8720i

59

Revision 1.0 (05-28-09)

DATASHEET

6.2.2.2

10M RMII Transmit Timing (50MHz REF_CLK IN)

Figure 6.5 10M RMII Transmit Timing Diagram (50MHz REF_CLK IN)

Table 6.5 10M RMII Transmit Timing Values (50MHz REF_CLK IN)

PARAMETER

DESCRIPTION

MIN

TYP

MAX

UNITS

NOTES

T10.1

Transmit signals required setup to
rising edge of CLKIN

4

ns

T10.2

Transmit signals required hold
after rising edge of CLKIN

2

ns

CLKIN frequency

50

MHz

Clock In -

CLKIN

Data In -

TXD[1:0]

T

10.1

TX_EN

T

10.2

Valid Data

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