±15kV ESD Protected MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support 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 4.13.
T1.1
Clock -
MDC
T1.2
Data Out -
Valid Data
MDIO
(Read from PHY)
T1.3
T1.4
Valid Data
Data In -
MDIO
(Write to PHY)
Figure 6.1 SMI Timing Diagram
Table 6.1 SMI Timing Values
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNITS
NOTES
T1.1
T1.2
MDC minimum cycle time
400
0
ns
ns
MDC to MDIO (Read from PHY)
delay
300
T1.3
T1.4
MDIO (Write to PHY) to MDC setup
MDIO (Write to PHY) to MDC hold
10
10
ns
ns
SMSC LAN8700/LAN8700i
Revision 2.3 (04-12-11)
DATA5S7HEET
SMSC [ SMSC CORPORATION ]
