MDIO Registers

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4.12 MDIO User PHY Select Register 0 (USERPHYSEL0)

The MDIO user PHY select register 0 (USERPHYSEL0) is shown in Figure 37 and described in Table 34.

Figure 37. MDIO User PHY Select Register 0 (USERPHYSEL0)

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 34. MDIO User PHY Select Register 0 (USERPHYSEL0) 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 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

Reserved

 

 

 

 

4-0

PHYADRMON

0-1Fh

PHY address whose link status is to be monitored.

 

 

 

 

80 Ethernet Media Access Controller (EMAC)/Management Data Input/Output SPRUFI5B –March 2009 –Revised December 2010

(MDIO)

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Texas Instruments TMS320DM36X manual Mdio User PHY Select Register 0 USERPHYSEL0, Linksel Linkintenb, Phyadrmon