Texas-instruments TMS320C645x DSP Manual de usuario descargar pdf (Pagina 70)

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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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Texas-instruments TMS320C645x DSP Manual de usuario Pagina 70