Datasheet
KSZ8081MNX/RNB
DS00002202C-page 52 2016-2018 Microchip Technology Inc.
7.7 Auto-Negotiation Timing
FIGURE 7-8: AUTO-NEGOTIATION TIMING
TABLE 7-6: RMII TIMING PARAMETERS – KSZ8081RNB (25 MHZ INPUT TO XI PIN, 50 MHZ
OUTPUT FROM REF_CLK PIN)
Timing Parameter Description Min. Typ. Max Units
t
CYC
Clock cycle — 20 — ns
t
1
Setup time 4 — — ns
t
2
Hold time 2 — — ns
t
OD
Output delay 7 10 13 ns
TABLE 7-7: RMII TIMING PARAMETERS – KSZ8081RNB (25 MHZ INPUT TO XI PIN)
Timing Parameter Description Min. Typ. Max Units
t
CYC
Clock cycle — 20 — ns
t
1
Setup time 4 — — ns
t
2
Hold time 2 — — ns
t
OD
Output delay 8 11 13 ns
AUTO -NEGOTIATION
FAST LINK PULSE (FLP) TIMING
t
PW
TX+/TX-
CLOCK
PULSE
DATA
PULSE
CLOCK
PULSE
t
PW
t
CTD
t
CTC
t
FLPW
t
BTB
TX+/TX-
DATA
PULSE
FLP
BURST
FLP
BURST