LAN8700 Datasheet, PDF (27/74 Pages) SMSC Corporation – ±15kV ESD Protected MII/RMII Fast-Ethernet PHY with HP Auto-MDIX and SMSC flexPWR TM in a Small Footprint

LAN8700/LAN8700i
FIGURE 4-7:
MDIO TIMING AND FRAME STRUCTURE - WRITE CYCLE
MDC
MDIO
Write Cycle
32 1's 0 1 0 1 A4 A3 A2 A1 A0 R4 R3 R2 R1 R0
D15 D14
Preamble
Start of
Frame
OP
Code
PHY Address
Register Address
Turn
Around
...
...
Data
D1 D0
Data To Phy
 2007-2016 Microchip Technology Inc.
DS00002260A-page 27