80220 Datasheet, PDF (80/91 Pages) LSI Computer Systems – 100BASE-TX/10BASE-T Ethernet Media Interface Adapter

80220/80221
MI SERIAL PORT TIMING CHARACTERISTICS
Refer to Figures 33-34 for Timing Diagrams
SYM PARAMETER
LIMIT
MIN
TYP
MAX UNIT
t
MDC High Time
20
101
t
MDC Low Time
20
102
t
MDIO Setup Time
10
103
t
MDIO Hold Time
10
104
t₁₀₅
MDC To MDIO Delay
t₁₀₆
MDIO Hi-Z To Active
Delay
nS
nS
nS
nS
20
nS
20
nS
t
MDIO Active To HI-Z
107
Delay
20
nS
t
Frame Delimiter (Idle)
32
108
Clocks
t
End Of Frame To
109
MDINT Transition
t
MDC To MDIO
110
Interrupt Pulse Assert
Delay
t
MDC To MDIO
111
Interrupt Pulse Deassert
Delay
100
nS
100
nS
100
nS
CONDITIONS
Write Bits
Write Bits
Read Bits
Write-Read Bit Transition
Read-Write Bit Transition
# of Consecutive MDC Clocks With
MDIO=1
80
MD400159/E