Instruction Manual

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