DP83849CVSSLASHNOPB datasheet(75/101 Pages) TI1

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7.3.9 Link Quality Monitor Register (LQMR), Page 2, address 1Dh

This register contains the controls for the Link Quality Monitor function. The Link Quality Monitor provides a mechanism

for programming a set of thresholds for DSP parameters. If the thresholds are violated, an interrupt will be asserted if

enabled in the MISR. Monitor control and status are available in this register, while the LQDR register controls read/write

access to threshold values and current parameter values. Reading of LQMR register clears warning bits and re-arms the

interrupt generation. In addition, this register provides a mechanims for allowing automatic reset of the 100Mb link based

on the Link Quality Monitor status

Table 51. Link Quality Monitor Register (LQMR), address 1Dh

Bit

Bit Name

Default

Description

LQM_ENABLE

0, RW

Link Quality Monitor Enable:

Enables the Link Quality Monitor. The enable is qualified by having

a valid 100Mb link. In addition, the individual thresholds can be dis-

abled by setting to the max or min values.

14:10

RESERVED

0, RO

RESERVED: Writes ignored, read as 0.

FC_HI_WARN

0, RO/COR

Frequency Control High Warning:

This bit indicates the Frequency Control High Threshold was ex-

ceeded. This register bit will be cleared on read.

FC_LO_WARN

0, RO/COR

Frequency Control Low Warning:

This bit indicates the Frequency Control Low Threshold was ex-

ceeded. This register bit will be cleared on read.

FREQ_HI_WARN

0, RO/COR

Frequency Offset High Warning:

This bit indicates the Frequency Offset High Threshold was ex-

ceeded. This register bit will be cleared on read.

FREQ_LO_WARN

0, RO/COR

Frequency Offset Low Warning:

This bit indicates the Frequency Offset Low Threshold was exceed-

ed. This register bit will be cleared on read.

DBLW_HI_WARN

0, RO/COR

DBLW High Warning:

This bit indicates the DBLW High Threshold was exceeded. This

DBLW_LO_WARN

0, RO/COR

DBLW Low Warning:

This bit indicates the DBLW Low Threshold was exceeded. This

DAGC_HI_WARN

0, RO/COR

DAGC High Warning:

This bit indicates the DAGC High Threshold was exceeded. This

DAGC_LO_WARN

0, RO/COR

DAGC Low Warning:

This bit indicates the DAGC Low Threshold was exceeded. This

C1_HI_WARN

0, RO/COR

C1 High Warning:

This bit indicates the DEQ C1 High Threshold was exceeded. This

C1_LO_WARN

0, RO/COR

C1 Low Warning:

This bit indicates the DEQ C1 Low Threshold was exceeded. This

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