Datasheet

 2013-2015 Microchip Technology Inc. DS00001987A-page 69
LAN8740A/LAN8740Ai
4.2.10 MMD ACCESS CONTROL REGISTER
This register in conjunction with the MMD Access Address/Data Register provides indirect access to the MDIO Man-
ageable Device (MMD) registers. Refer to Section 4.3, "MDIO Manageable Device (MMD) Registers" for additional
details.
Index (In Decimal): 13 Size: 16 bits
Bits Description Type Default
15:14 MMD Function
This field is used to select the desired MMD function:
00 = Address
01 = Data, no post increment
10 = RESERVED
11 = RESERVED
R/W 00b
13:5 RESERVED RO -
4:0 MMD Device Address (DEVAD)
This field is used to select the desired MMD device address.
(3 = PCS, 7 = auto-negotiation)
R/W 0h