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4.14 MDIO User PHY Select Register 1 (USERPHYSEL1)
The MDIO user PHY select register 1 (USERPHYSEL1) is shown in Figure 39 and described in
Table 36.
Figure 39. MDIO User PHY Select Register 1 (USERPHYSEL1)
31 16
Reserved
R-0
15 8 7 6 5 4 0
Reserved LINKSEL LINKINTENB Rsvd PHYADRMON
R-0 R/W-0 R/W-0 R-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 36. MDIO User PHY Select Register 1 (USERPHYSEL1) Field Descriptions
Bit Field Value Description
31-8 Reserved 0 Reserved
7 LINKSEL 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.
6 LINKINTENB Link change interrupt enable. Set to 1 to enable link change status interrupts for the 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.
5 Reserved 0 PHY address whose link status is to be monitored.
4-0 PHYADRMON 0-1Fh PHY address whose link status is to be monitored.
82
Ethernet Media Access Controller (EMAC)/Management Data Input/Output SPRUFI5B–March 2009–Revised December 2010
(MDIO)
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