KSZ8893MQLI Datasheet, PDF (106/116 Pages) Micrel Semiconductor – Integrated 3-Port 10/100 Managed Switch with PHYs

Micrel, Inc.
RMII Timing
Transm it
Tim ing
REFCLK
M TXD[1:0]
MTXEN
Receive
Tim in g
R EFC LK
M R X D [1:0]
MRXDV
tcyc
t1
t2
KSZ8893MQL/MBL
Figure 22: RMII Timing – Data Received from RMII
tcyc
tod
Figure 23: RMII Timing – Data Input to RMII
Timing Parameter Description
Min
Typ
Max
Unit
tcyc
Clock cycle
20
ns
t1
Setup time
4
ns
t2
Hold time
2
ns
tod
Output delay
2.8
10
ns
Table 27: RMII Timing Parameters
February 2010
106
M9999-021110-1.6