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4.12 MDIO User PHY Select Register 0 (USERPHYSEL0)
The MDIO user PHY select register 0 (USERPHYSEL0) is shown in
Table
36.
31
15
Reserved
R-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 36. MDIO User PHY Select Register 0 (USERPHYSEL0) Field Descriptions
Bit
Field
31-8
Reserved
7
LINKSEL
6
LINKINTENB
5
Reserved
4-0
PHYADRMON
SPRUEQ6 – December 2007
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Figure 38. MDIO User PHY Select Register 0 (USERPHYSEL0)
8
Value
Description
0
Reserved
Link status determination select bit. Default value is 0, which implies that the link status is
determined by the MDIO state machine. This is the only option supported on this device.
0
The link status is determined by the MDIO state machine.
1
Not supported.
Link change interrupt enable. Set to 1 to enable link change status interrupts for PHY address
specified in PHYADRMON. Link change interrupts are disabled if this bit is set to 0.
0
Link change interrupts are disabled.
1
Link change status interrupts for PHY address specified in PHYADDRMON bits are enabled.
0
Reserved
0-1Fh
PHY address whose link status is to be monitored.
Ethernet Media Access Controller (EMAC)/Management Data Input/Output (MDIO)
Figure 38
Reserved
R-0
7
6
5
LINKSEL LINKINTENB
Rsvd
R/W-0
R/W-0
R-0
MDIO Registers
and described in
4
PHYADRMON
R/W-0
16
0
81
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