Intel C2518 FH8065501516710 Data Sheet

Intel

®

 Atom™ Processor C2000 Product Family for Microserver

September 2014

Datasheet, Vol. 2 of 3

Order Number: 330061-002US

205

MDIO0, if enabled, can be configured as either “shared” or “not-shared” (a.k.a. 

“dedicated”) through the value of the COM_MDIO bit of the MDC/MDIO Configuration 

(MDICNFG) register, which is an MMIO register for LAN Port 0. Regardless of its 

COM_MDIO setting, MDIO0 is always used by LAN Port 0.

COM_MDIO = 0: Not Shared
COM_MDIO = 1: Shared

See 

.

For LAN Port 1, MDIO1, if enabled, is used unless the COM_MDIO bit for both LAN Port 

0 and LAN Port 1 are “1” indicating “shared.” If both are “1,” MDIO0 is used if it is 

enabled.

For LAN Port 2 and for LAN Port 3, when their COM_MDIO bit indicates “shared,” MDIO0 

is used by the LAN Port. When the bit indicates “not-shared,” no MDIO interface is used 

by the particular LAN Port.

0

0



pins not functional

0

1



pins not functional

1

0



pins not functional

1

1



MDIC, I2CCMD