LAN8187_06 SMSC [SMSC Corporation], LAN8187_06 Datasheet - Page 55

• Manufacturer Part Number: LAN8187_06
• Manufacturer: SMSC [SMSC Corporation]

±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWR
Datasheet
Chapter 6 AC Electrical Characteristics
SMSC LAN8187/LAN8187I
6.1
PARAMETER
T1.1
T1.2
T1.3
T1.4
The timing diagrams and limits in this section define the requirements placed on the external signals
of the Phy.
The Serial Management Interface is used for status and control as described in
Serial Management Interface (SMI) Timing
MDC minimum cycle time
MDC to MDIO (Write) delay
MDIO (Read) to MDC setup
MDIO (Read) to MDC hold
MDIO
(Read from PHY)
MDIO
(Write to PHY)
MDC
DESCRIPTION
Figure 6.1 SMI Timing Diagram
Table 6.1 SMI Timing Values
T1.1
T1.3
DATASHEET
Valid Data
55
Valid Data
MIN
400
10
10
0
T1.4
TM
T1.2
TYP
MAX
300
UNITS
ns
ns
ns
ns
Section
Revision 1.0 (12-14-06)
4.13.
NOTES