ICS1892 Integrated Circuit Systems, ICS1892 Datasheet - Page 80
ICS1892
Manufacturer Part Number
ICS1892
Description
10Base-T/100Base-TX Integrated PHYceiver
Manufacturer
Integrated Circuit Systems
Datasheet
1.ICS1892.pdf
(148 pages)
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8.8 Register 6: Auto-Negotiation Expansion Register
8.8.1 IEEE Reserved Bits (bits 6.15:5)
ICS1892, Rev. D, 2/26/01
Table 8-13
Auto-Negotiation process.
Note:
Table 8-13. Auto-Negotiation Expansion Register (register 6 [0x06])
† 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.
The ISO/IEC specification reserves these bits for future use. When an STA:
•
•
ICS uses some of these reserved bits to invoke auxiliary functions. To ensure proper operation of the
ICS1892, 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:
•
•
6.15
6.14
6.13
6.12
6.11
6.10
6.9
6.8
6.7
6.6
6.5
6.4
6.3
6.2
6.1
6.0
Bit
Reads a reserved bit, the ICS1892 returns a logic zero.
Writes to a reserved bit, the STA must use the default value specified in this data sheet.
Zero, the ICS1892 isolates all STA writes to CW bits.
One, an STA can modify the value of these bits
ICS1892 Data Sheet
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
IEEE reserved
Parallel detection fault
Link partner Next Page
able
Next Page able
Page received
Link partner
Auto-Negotiation able
For an explanation of acronyms used in
lists the bits for the Auto-Negotiation Expansion Register, which indicates the status of the
Definition
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
Always 0
No Fault
Link partner is not Next
Page able
Local device is not Next
Page able
Next Page not received
Link partner is not
Auto-Negotiation able
When Bit = 0
80
Table
8-13, see
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Multiple technologies
detected
Link partner is Next Page
able
Local device is Next Page
able
Next Page received
Link partner is
Auto-Negotiation able
When Bit = 1
Chapter 1, “Abbreviations and
Chapter 8 Management Register Set
cess
Ac-
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
RO
RO
RO
RO
RO
February 26, 2001
SF
LH
LH
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Acronyms”.
fault
De-
0†
0†
0†
0†
0†
0†
0†
0†
0†
0†
0†
0
0
1
0
0
Hex
0
0
0
4
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