AM79C976 Advanced Micro Devices, AM79C976 Datasheet - Page 298
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AM79C976
Manufacturer Part Number
AM79C976
Description
PCnet-PRO 10/100 Mbps PCI Ethernet Controller
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C976.pdf
(309 pages)
- Current page: 298 of 309
- Download datasheet (3Mb)
Auto-Negotiation Advertisement
Register (Register 4)
The purpose of this register is to advertise the technol-
ogy ability to the link partner device. See Table 4.
The technology bit field consists of bits A0-A8 in the
IEEE 802.3 Selector Base Page. Table 5 summarizes
the bit assignments.
B-3
Bit(s)
12:5
4:0
15
14
13
Bit
A0
A1
A2
A3
A4
A5
A6
A7
Table B-5. Technology Ability Field Bit
Technology Ability
10BASE-T
10BASE-T Full Duplex
100BASE-TX
100BASE-TX Full Duplex
100BASE-T4
PAUSE operation for full duplex links
Reserved for future technology
Reserved for future technology
Selector Field
Remote Fault
Next Page
Reserved
Name
Assignments
Table B-4. Auto-Negotiation Advertisement Register (Register 4)
Technology
When set, the device wishes to engage in next page exchange. If clear, the
device does not wish to engage in next page exchange
Ignore when read
When set, a remote fault bit is inserted into the base link code word during
the Auto Negotiation process. When cleared, the base link code word will
have the bit position for remote fault as cleared
Technology ability field
Selector field
P R E L I M I N A R Y
Am79C976
Description
When this register is modified, Restart Auto-Negotia-
tion (Register 0, bit 9) must be enabled to guarantee
the change is implemented.
Read/
Write
R/W
R/W
R/W
RO
RO
8/01/00
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