lxt9781 Intel Corporation, lxt9781 Datasheet - Page 60

• Manufacturer Part Number: lxt9781
• Description: Fast Ethernet 10/100 Multi-port Transceiver With Rmii
• Manufacturer: Intel Corporation

LXT9761/9781 — Fast Ethernet 10/100 Multi-Port Transceiver with RMII
60
MDIO setup before MDC, sourced by
STA
MDIO hold after MDC,
sourced by STA
MDC to MDIO output delay, sourced
by PHY
1. Typical values are at 25° C and are for design aid only; not guaranteed and not subject to production testing.
Figure 34. MDIO Write Timing (MDIO Sourced by MAC)
Figure 35. MDIO Read Timing (MDIO Sourced by PHY)
Table 30. MDIO Timing Parameters
Parameter
MDIO
MDIO
MDC
MDC
Sym
t1
t2
t3
t3
Min
10
10
10
1
1
–
t1
Typ
130
–
–
–
–
–
1
t2
Max
300
–
–
–
–
–
Units
ns
ns
ns
ns
ns
ns
MDC = 2.5 MHz
MDC = 8 MHz
MDC = 2.5 MHz
MDC = 8 MHz
MDC = 2.5 MHz
MDC = 8 MHz
Test Conditions
Datasheet