Micrel
RMII AC Characteristics
RMII Transmit Timing
REF_CLK
TXD[1:0]
TXEN
20ns
t1
t2
Parameter
Min
Typ
REF_CLK Frequency
50
TXD[1:0], TX_EN, Data Setup to REF_CLK rising
edge
4
TXD[1:0], TX_EN, Data hold from REF_CLK rising
edge
2
RMII Receive Timing
20ns
REF_CLK
RXD[1:0]
RXDV
RXER
tod
Parameter
Min
REF_CLK Frequency
RXD[1:0], CRS_DV, RX_ER Output delay from
REF_CLK rising edge
2.8
June 2009
Typ
50
16
KSZ8001
Max
Unit
MHz
ns
ns
Max
Unit
MHz
10
ns
Revision 1.04