ICS1893CF datasheet(74/127 Pages) RENESAS

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ICS1893CF, Rev. K, 05/13/10

May, 2010

Chapter 7 Management Register Set

ICS1893CF Data Sheet - Release

Note: An MDIO read of these bits provides a history of the greatest progress achieved by the

auto-negotiation process. In addition, the MDIO read latches the present state of the

Auto-Negotiation State Machine for a subsequent read.

7.12.4 100Base-TX Receive Signal Lost (bit 17.10)

The 100Base-TX Receive Signal Lost bit indicates to an STA whether the ICS1893CF has lost its

100Base-TX Receive Signal. If this bit is set to a logic:

• Zero, it indicates the Receive Signal has remained valid since either the last read or reset of this register.

• One, it indicates the Receive Signal was lost since either the last read or reset of this register.

This bit is a latching high bit. (For more information on latching high and latching low bits, see Section

7.1.4.1, “Latching High Bits” and Section 7.1.4.2, “Latching Low Bits”.)

Note: This bit has no definition in 10Base-T mode.

7.12.5 100Base PLL Lock Error (bit 17.9)

The Phase-Locked Loop (PLL) Lock Error bit indicates to an STA whether the ICS1893CF has ever

experienced a PLL Lock Error. A PLL Lock Error occurs when the PLL fails to lock onto the incoming

100Base data stream. If this bit is set to a logic:

• Zero, it indicates that a PLL Lock Error has not occurred since either the last read or reset of this register.

• One, it indicates that a PLL Lock Error has occurred since either the last read or reset of this register.

This bit is a latching high bit. (For more information on latching high and latching low bits, see Section

7.1.4.1, “Latching High Bits” and Section 7.1.4.2, “Latching Low Bits”.)

Note: This bit has no definition in 10Base-T mode.

Table 7-19. Auto-Negotiation State Machine (Progress Monitor)

Auto-Negotiation State Machine

Auto-Negotiation Progress Monitor

Auto-

Negotiation

Complete Bit

(Bit 17.4)

Auto-

Negotiation

Monitor Bit 2

(Bit 17.13)

Auto-

Negotiation

Monitor Bit 1

(Bit 17.12)

Auto-

Negotiation

Monitor Bit 0

(Bit 17.11)

Idle

0000

Parallel Detected

0001

Parallel Detection Failure

0010

Ability Matched

0011

Acknowledge Match Failure

0100

Acknowledge Matched

0101

Consistency Match Failure

0110

Consistency Matched

0111

Auto-Negotiation Completed

Successfully

1000

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