AM79C901A Datasheet, PDF (60/90 Pages) Advanced Micro Devices – HomePHY Single-Chip 1/10 Mbps Home Networking PHY

PRELIMINARY
TBR4: 10BASE-T Auto-Negotiation Advertisement Register (Register 4)
This register contains the advertised ability of the
Am79C901A home networking device. The purpose of
this register is to advertise the technology ability to the
link partner device. See Table 45.
When this register is modified, Restart Auto-
Negotiation (Register 0, bit 9) must be enabled to
guarantee the change is implemented.
Bits
15
14
13
12:11
10
9
8
7
6
5
4:0
Table 45. TBR4: 10BASE-T Auto-Negotiation Advertisement Register (Register 4)
Name
Description
Read/
Write
Default
Value
(hex)
When set, the device wishes to engage in next page exchange. If
Next Page
cleared, the device does not wish to engage in next page
R/W
0
exchange.
Reserved
R
0
When set, a remote fault bit is inserted into the base link code
Remote Fault
word during the Auto-Negotiation process. When cleared, the
base link code work will have the bit position for remote fault as
R/W
0
cleared.
Reserved
R
0
PAUSE
This bit should be set if the PAUSE capability is to be advertised.
R/W
0
Reserved
R
0
Full-Duplex - This bit advertises Full-Duplex capability. When set, Full-Duplex
100BASE-TX _{capability is advertised. When cleared, Full-Duplex capability is}
R
0
not advertised.
Half-Duplex - This bit advertises Half-Duplex capability for the Auto-Negotiation
100BASE-TX process. Setting this bit advertises Half-Duplex capability.
R
0
Clearing this bit does not advertise Half-Duplex capability.
Full-Duplex - This bit advertises Full-Duplex capability. When set, Full-Duplex
10BASE-T
capability is advertised. When cleared, Full-Duplex capability is
R/W
1
not advertised.
Half-Duplex - This bit advertises Half-Duplex capability for the Auto-Negotiation
10BASE-T
process. Setting this bit advertises Half-Duplex capability.
R/W
1
Clearing this bit does not advertise Half-Duplex capability.
Selector Field
The 10BASE-T PHY of the Am79C901A home networking device
is an 802.3 compliant device.
R
01
60
Am79C901A