DP83848M_08 Datasheet, PDF (68/80 Pages) National Semiconductor (TI) – PHYTER® Mini - Commercial Temperature Single 10/100 Ethernet Transceiver

8.2.11 10 Mb/s MII Transmit Timing
T2.11.1
TX_CLK
TXD[3:0]
TX_EN
T2.11.2
Valid Data
T2.11.1
T2.11.3
Parameter
Description
T2.11.1
TX_CLK High/Low Time
T2.11.2
TXD[3:0], TX_EN Data Setup to TX_CLK fall
T2.11.3
TXD[3:0], TX_EN Data Hold from TX_CLK rise
Notes
10 Mb/s MII mode
10 Mb/s MII mode
10 Mb/s MII mode
Min Typ Max Units
190 200 210 ns
25
ns
0
ns
Note: An attached Mac should drive the transmit signals using the positive edge of TX_CLK. As shown above, the MII
signals are sampled on the falling edge of TX_CLK.
8.2.12 10 Mb/s MII Receive Timing
T2.12.1
RX_CLK
RXD[3:0]
RX_DV
T2.12.2
T2.12.1
T2.12.3
Valid Data
Parameter
Description
T2.12.1
RX_CLK High/Low Time
T2.12.2
RX_CLK to RXD[3:0], RX_DV Delay
T2.12.3
RX_CLK rising edge delay from RXD[3:0],
RX_DV Valid
Notes
10 Mb/s MII mode
10 Mb/s MII mode
Min Typ Max Units
160 200 240 ns
100
ns
100
ns
Note: RX_CLK may be held low for a longer period of time during transition between reference and recovered clocks.
Minimum high and low times will not be violated.
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