LAN83C183 Datasheet, PDF (105/113 Pages) SMSC Corporation – FAST ETHERNET PHYSICAL LAYER DEVICE

5.4.1 MI Serial Port Timing Characteristics
Table 5.15 shows the MI Serial Port AC timing parameters. See Figure 5.19 and
Figure 5.20 for the associated timing diagram.
Table 5.15 MI Serial Port Timing
Sym
Parameter
Min
t101 MDC High Time
20
t102 MDC Low Time
20
t103 MDIO Setup Time
10
t104 MDIO Hold Time
10
t105 MDC To MDIO Delay
t106 MDIO Hi-Z To Active Delay
t107 MDIO Active To HI-Z Delay
t108 Frame Delimiter (Idle)
32
Limit
Typ
t109 End Of Frame To MDINTn
Transition
t110 MDC To MDIO Interrupt
Pulse Assert Delay
t111 MDC To MDIO Interrupt
Pulse Deassert Delay
Max Unit
Conditions
ns
ns
ns Write bits
ns Write bits
20
ns Read bits
20
ns Write-Read Bit Transition
20
ns Read-Write bit transition
Clocks Number of consecutive MDC clocks
with MDIO = 1
100
ns
100
ns
100
ns
Figure 5.19 MI Serial Port Timing
MDC
MDIO
(READ)
MDIO
(WRITE)
MDINTn
0
t₁₀₃
ST1
t₁₀₃
ST1
1
t₁₀₄
ST0
t₁₀₄
ST0
t₁₀₁
t₁₀₂
13
14
15
16
17
t₁₀₆
t₁₀₅
REGAD0
TA0 D15 D14
TA1
30
31
t₁₀₇
D0
REGAD0 TA1
TA0
D15
D1
D0
t₁₀₉
SMSC DS – LAN83C183
105
Rev. 12/14/2000