LAN8187I SMSC [SMSC Corporation], LAN8187I Datasheet - Page 53

• Manufacturer Part Number: LAN8187I
• Description: High-Performance MII and RMII 10/100 Ethernet PHY with HP Auto-MDIX
• Manufacturer: SMSC [SMSC Corporation]

High-Performance MII and RMII 10/100 Ethernet PHY with HP Auto-MDIX
Datasheet
Chapter 6 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
53
Valid Data
MIN
400
10
10
0
T1.4
T1.2
TYP
MAX
300
UNITS
ns
ns
ns
ns
Section
Revision 0.6 (02-24-06)
4.13.
NOTES