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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