LAN8710 Datasheet, PDF (55/79 Pages) SMSC Corporation – MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR Technology in a Small Footprint

MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR^® Technology in a Small Footprint
Datasheet
Chapter 6 AC Electrical Characteristics
The timing diagrams and limits in this section define the requirements placed on the external signals
of the Phy.
6.1
Serial Management Interface (SMI) Timing
The Serial Management Interface is used for status and control as described in Section 4.14.
Clock -
MDC
Data Out -
MDIO
Data In -
MDIO
T_1.1
T_1.2
Valid Data
(Read from PHY)
T_1.3
T_1.4
Valid Data
(Write to PHY)
Figure 6.1 SMI Timing Diagram
PARAMETER
T1.1
T1.2
T1.3
T1.4
Table 6.1 SMI Timing Values
DESCRIPTION
MIN TYP
MDC minimum cycle time
400
MDC to MDIO (Read from PHY)
0
delay
MDIO (Write to PHY) to MDC setup 10
MDIO (Write to PHY) to MDC hold 10
MAX
30
UNITS
ns
ns
ns
ns
NOTES
SMSC LAN8710/LAN8710i
55
DATASHEET
Revision 1.0 (04-15-09)