Maxim Integrated DS33Z41 - Manual (Page 147)

DS33Z41 Quad IMUX Ethernet Mapper
147 of 167
Table 11-8. Receive RMII Interface
10Mbps 100Mbps
PARAMETER SYMBOL
MIN TYP MAX MIN TYP MAX
UNITS
REF_CLK Frequence
50MHz
±50ppm
50MHz
±50ppm
MHz
REF_CLK Period t1 20 20 ns
REF_CLK Low Time t2 7 13 7 13 ns
REF_CLK High Time t3 7 13 7 13 ns
RXD, CRS_DV to
REF_CLK Setup Time
t8 5 5 ns
REF_CLK to RXD,
CRS_DV Hold Time
t9 5 5 ns
Figure 11-4. Receive RMII Interface Timing
t8 t9
REF_CLK
RXD[1:0]
CRS_DV
t8 t9
t5
t6
t7