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DS33Z41 Quad IMUX Ethernet Mapper
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11.3 RMII Interface
Table 11-7. Transmit RMII Interface
10Mbps 100Mbps
PARAMETER SYMBOL
MIN TYP MAX
MIN TYP
MAX
UNITS
REF_CLK Frequency
50MHz
±
50ppm
50MHz
±
50ppm
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
REF_CLK to TXD,
TX_EN Delay
t4 5 10
5 10
ns
Figure 11-3. Transmit RMII Interface
REF_CLK
TXD[1:0]
TX_EN
t4
t4
t2
t3
t1