ICS1893BF Data Sheet Rev. E - Release
Chapter 7 Management Register Set
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.
Table 7-19. Auto-Negotiation State Machine (Progress Monitor)
Auto-Negotiation State Machine
Auto-Negotiation Progress Monitor
Auto-
Auto-
Auto-
Auto-
Negotiation
Negotiation
Negotiation
Negotiation
Complete Bit Monitor Bit 2 Monitor Bit 1 Monitor Bit 0
(Bit 17.4)
(Bit 17.13)
(Bit 17.12)
(Bit 17.11)
Idle
0
0
0
0
0
0
0
0
1
0
0
0
0
1
1
1
1
0
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
Parallel Detected
Parallel Detection Failure
Ability Matched
Acknowledge Match Failure
Acknowledge Matched
Consistency Match Failure
Consistency Matched
Auto-Negotiation Completed
Successfully
7.12.4 100Base-TX Receive Signal Lost (bit 17.10)
The 100Base-TX Receive Signal Lost bit indicates to an STA whether the ICS1893BF 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 ICS1893BF 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.
ICS1893BF, Rev. E, 8/11/09
August, 2009
Copyright © 2009, IDT, Inc.
All rights reserved.
81
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
