DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver

Table 13-8. Receive RMII Interface

(Note 1, Figure 13-4)

PARAMETER

SYMBOL

 

10Mbps

 

 

100Mbps

 

UNITS

MIN

TYP

MAX

MIN

TYP

MAX

 

 

 

REF_CLK Frequency

 

 

50MHz

 

 

50MHz

 

MHz

 

 

±50ppm

 

 

±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

 

 

 

 

 

 

 

 

 

RXD, CRS_DV to REF_CLK Setup

t8

5

 

 

5

 

 

ns

Time

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REF_CLK to RXD, CRS_DV Hold

t9

5

 

 

5

 

 

ns

Time

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note 1: Timing parameters in this table are guaranteed by design (GBD).

Figure 13-4. Receive RMII Interface Timing

 

t5

REF_CLK

t7

t6

t8

t9

RXD[3:0]

 

t8

t9

CRS_DV

 

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Maxim DS33R11 specifications Receive Rmii Interface Timing