
DS33Z41 Quad IMUX Ethernet Mapper
Table 11-8. Receive RMII Interface
PARAMETER | SYMBOL |
| 10Mbps |
|
| 100Mbps |
| UNITS | |
MIN | TYP | MAX | MIN | TYP | MAX | ||||
|
|
| |||||||
REF_CLK Frequence |
|
| 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 | t8 | 5 |
|
| 5 |
|
| ns | |
REF_CLK Setup Time |
|
|
|
| |||||
|
|
|
|
|
|
|
| ||
REF_CLK to RXD, | t9 | 5 |
|
| 5 |
|
| ns | |
CRS_DV Hold Time |
|
|
|
| |||||
|
|
|
|
|
|
|
|
Figure 11-4. Receive RMII Interface Timing
| t5 |
REF_CLK | t7 |
t6 | |
t8 | t9 |
RXD[1:0] |
|
t8 | t9 |
CRS_DV |
|
147 of 167