Datasheet

KSZ8721BL/SL
DS00002813A-page 30  2018 Microchip Technology Inc.
7.3 100BASE-T MII Receive Timing
FIGURE 7-3: 100BASE-T MII RECEIVE TIMING
TABLE 7-3: 100BASE-T MII RECEIVE TIMING PARAMETERS
Parameter Symbol Min. Typ. Max. Units
RXC Period t
P
—40—ns
RXC Pulse Width t
WL
20 — — ns
RXC Pulse Width t
WH
20 — — ns
RXD [3:0], RXER, RXDV Set-Up to Rising Edge of RXC t
SU
—20—ns
RXD [3:0], RXER, RXDV Hold from Rising Edge of RXC t
HD
—20—ns
CRS to RXD Latency, 4B or 5B Aligned t
RLAT
—6—BT
“Start of Stream” to CSR Asserted t
CRS1
106 — 138 ns
“End of Stream” to CSR De-Asserted t
CRS2
154 — 186 ns
RX+/RX-
RXD[3:0]
RXER
CRS
t
CRS1
t
CRS2
RXDV
t
RLAT
t
SU
t
HD
RXC
t
WL
t
WH
t
P
End of
Stream
Start of
Stream