Datasheet

Micrel, Inc. KS8721BL/SL
June 2009
28
M9999-062509-1.3
End of
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Start of
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Figure 6. 100BASE-T MII Receive Timing
Symbol Parameter Min Typ Max Units
t
P
RXC Period 40 ns
t
WL
RXC Pulse Width 20 ns
t
WH
RXC Pulse Width 20 ns
t
SU
RXD [3:0], RXER, RXDV Set-Up to Rising Edge of RXC 20 ns
t
HD
RXD [3:0], RXER, RXDV Hold from Rising Edge of RXC 20 ns
t
RLAT
CRS to RXD Latency, 4B or 5B Aligned 6 BT
t
CRS1
“Start of Stream” to CSR Asserted 106 138 ns
t
CRS2
“End of Stream” to CSR De-Asserted 154 186 ns
Table 5. 100BASE-T MII Receive Timing Parameters