ICS1893AF Data Sheet - Release
Chapter 8 Management Register Set
8.8 Register 6: Auto-Negotiation Expansion Register
Table 8-13 lists the bits for the Auto-Negotiation Expansion Register, which indicates the status of the
Auto-Negotiation process.
Note: For an explanation of acronyms used in Table 8-13, see Chapter 1, “Abbreviations and Acronyms”.
Table 8-13. Auto-Negotiation Expansion Register (register 6 [0x06])
Bit
Definition
When Bit = 0
When Bit = 1
Ac- SF De- Hex
cess
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
fault
0†
0†
0†
0†
0†
0†
0†
0†
0†
0†
0†
0
6.15 IEEE reserved
6.14 IEEE reserved
6.13 IEEE reserved
6.12 IEEE reserved
6.11 IEEE reserved
6.10 IEEE reserved
Always 0
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
–
–
–
–
–
–
–
–
–
–
–
0
0
0
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
No Fault
6.9
6.8
6.7
6.6
6.5
6.4
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
Parallel detection fault
Multiple technologies
detected
RO LH
6.3
6.2
Link partner Next Page
able
Link partner is not Next
Page able
Link partner is Next Page
able
RO
RO
–
–
0
1
4
Next Page able
Local device is not Next
Page able
Local device is Next Page
able
6.1
6.0
Page received
Next Page not received
Next Page received
RO LH
RO
0
0
Link partner
Link partner is not
Link partner is
–
Auto-Negotiation able
Auto-Negotiation able
Auto-Negotiation able
† As per the IEEE Std 802.3u, during any write operation to any bit in this register, the STA must write the default value
to all Reserved bits.
8.8.1 IEEE Reserved Bits (bits 6.15:5)
The ISO/IEC specification reserves these bits for future use. When an STA:
• Reads a reserved bit, the ICS1893AF returns a logic zero.
• Writes to a reserved bit, the STA must use the default value specified in this data sheet.
ICS uses some reserved bits to invoke auxiliary functions. To ensure proper operation of the ICS1893AF,
an STA must maintain the default value of these bits. Therefore, ICS recommends that an STA always write
the default value of any reserved bits during all management register write operations.
Reserved bits 5.15:5 are Command Override Write (CW) bits. When the Command Register Override bit
(bit 16.15) is logic:
• Zero, the ICS1893AF isolates all STA writes to CW bits.
• One, an STA can modify the value of these bits
ICS1893AF, Rev D 10/26/04
October, 2004
Copyright © 2004, Integrated Circuit Systems, Inc.
All rights reserved.
78
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