EP80579 Datasheet, PDF (1562/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
38.4.1
38.4.1.1
Detailed Register Descriptions
Offset 0x00000010h: MDIO_STATUS - MDIO Status Register
Table 38-3. Offset 0x00000010h: MDIO_STATUS - MDIO Status Register
Description: Status register for communicating with MDIO devices.
View: PCI
BAR: CSRBAR
Bus:Device:Function: M:3:0
Offset Start: 00000010h
Offset End: 00000013h
Size: 32 bit
Default: 00000000h
Power Well: Core
Bit Range Bit Acronym
Bit Description
31
30 :16
15 :00
MDIO_STATUS
0 = Successfully read
1 = Read Error
RSVD
Reserved
MDIO_READ_D
ATA
Read
Data
Sticky
Bit Reset
Value
0b
0000h
0000h
Bit Access
RO
RO
RO
38.4.1.2 Offset 0x00000014h: MDIO_COMMAND - MDIO Command Register
Table 38-4. Offset 0x00000014h: MDIO_COMMAND - MDIO Command Register
Description: Command register for communicating with MDIO devices.
View: PCI
BAR: CSRBAR
Bus:Device:Function: M:3:0
Offset Start: 00000014h
Offset End: 00000017h
Size: 32 bit
Default: 00000000h
Power Well: Core
Bit Range
31
Bit Acronym
Bit Description
Sticky
MDIO_Go
Application logic sets this to “1” to start the MDIO
access. This bit remains “1” during the access. When the
access is finished, this bit is reset to “0”.
Bit Reset
Value
0b
Bit Access
RW
30 :27
26
25 :21
20 :16
15 :00
RSVD
Reserved for future use.
MDIO_Oper
1 = MDIO Write Access
0 = MDIO Read Access
Note: Once the transaction completes (as indicated by
MDIO_Go returning “0”), this bit is also reset to ‘0’.
MDIO_PHY_AD
DR
Physical address of the PHY to be accessed.
MDIO_PHY_RE
G
Register number of the PHY register to be accessed.
Note: Once the transaction completes (as indicated by
MDIO_Go returning “0”), this field is also reset to ‘0’.
MDIO_WRITE_
DATA
Write data on MDIO write accesses.
Note: Once the transaction completes (as indicated by
MDIO_Go returning “0”), this field is also reset to ‘0’.
0h
RV
0b
RW
0h
RW
00h
RW
0000h
RW
Intel^® EP80579 Integrated Processor Product Line Datasheet
1562
August 2009
Order Number: 320066-003US