DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
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Table 13-8. Receive RMII Interface
(Note 1,
Figure 13-4
)
10Mbps 100Mbps
PARAMETER SYMBOL
MIN TYP MAX
MIN TYP MAX
UNITS
REF_CLK Frequency
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
Note 1:
Timing parameters in this table are guaranteed by design (GBD).
Figure 13-4. Receive RMII Interface Timing
t8
t9
REF_CLK
RXD[3:0]
CRS_DV
t8
t9
t5
t6
t7