Incor User's Guide Ethernet Media Access Controller TMS320C645x DSP

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4.5 PHY Link Status Register (LINK)
MDIO Registers
The PHY link status register (LINK) is shown in Figure 19 and described in Table 18 .
Figure 19. PHY Link Status Register (LINK)
31 16
LINK
R-0
15 0
LINK
R-0
LEGEND: R = Read only; - n = value after reset
Table 18. PHY Link Status Register (LINK) Field Descriptions
Bit Field Value Description
31-0 LINK MDIO Link state bits. This register is updated after a read of the Generic Status Register of a PHY.
The bit is set if the PHY with the corresponding address has link and the PHY acknowledges the
read transaction. The bit is reset if the PHY indicates it does not have link or fails to acknowledge
the read transaction. Writes to the register have no effect.
0 The PHY indicates it does not have a link or fails to acknowledge the read transaction
1 The PHY with the corresponding address has a link and the PHY acknowledges the read
transaction
Ethernet Media Access Controller (EMAC)/Management Data Input/Output (MDIO)70 SPRU975B – August 2006
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