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IP178C
Preliminary Data Sheet
3.3.3
RMII Timing
a. Receive Timing Requirements
Symbol
Description
Min.
Typ.
Max.
Unit
TClk
Clock period
-
20
-
ns
TsRxClk
RXDV, RXD to RMII_CLK_IN setup time
2
-
-
ns
ThRxClk
RXDV, RXD to RMII_CLK_IN hold time
0.5
-
-
ns
R M II_C LK _ IN
R X DV, RX D[1 :0 ]
T sRxClk
T hRxClk
T Clk
b. Transmit Timing
Symbol
Description
Min.
Typ.
Max.
Unit
TClk
Clock period
-
20
-
ns
TdTxClk
RMII_CLK_IN rising edge to TXEN, TXD
1
-
4
ns
TdTxClk
RMII_CLK_IN
TXEN, TXD[1:0]
TClk
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October 27, 2005
Copyright © 2004, IC Plus Corp.
IP178C-DS-R09