LAN8740A Datasheet, PDF (69/136 Pages) Microchip Technology – Small Footprint MII/RMII 10/100 Energy Efficient Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology

LAN8740A/LAN8740Ai
4.2.10 MMD ACCESS CONTROL REGISTER
Index (In Decimal): 13
Size:
16 bits
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.
Bits
15:14
13:5
4:0
Description
MMD Function
This field is used to select the desired MMD function:
00 = Address
01 = Data, no post increment
10 = RESERVED
11 = RESERVED
RESERVED
MMD Device Address (DEVAD)
This field is used to select the desired MMD device address.
(3 = PCS, 7 = auto-negotiation)
Type
R/W
Default
00b
RO
-
R/W
0h
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DS00001987A-page 69