am79c875 Advanced Micro Devices, am79c875 Datasheet - Page 28

• Manufacturer Part Number: am79c875
• Description: Netphy ?lp Low Power Quad 10/100-tx/fx Ethernet Transceiver
• Manufacturer: Advanced Micro Devices

PHY Identifier 1 Register (Register 2)
PHY Identifier 2 Register (Register 3)
Auto-Negotiation Advertisement Register (Register 4)
28
Reg
Reg
Reg
2
3
3
3
4
4
4
4
4
4
4
4
4
4
4
15:10
12:11
15:0
Bit
9:4
3:0
Bit
Bit
4:0
15
14
13
10
9
8
7
6
5
Revision Number
Model Number
Selector Field
Acknowledge
Remote Fault
100BASE-TX
100BASE-TX
100BASE-T4
Half Duplex
Half Duplex
Full Duplex
Full Duplex
10BASE-T
10BASE-T
Next Page
Reserved
Name
Name
Table 11.
Name
FDFC
OUI
OUI
Table 10.
Table 9.
Auto-Negotiation Advertisement Register (Register 4)
Description
Composed of the 3rd through 18th bits of the Organizationally
Unique Identifier (OUI), respectively.
Description
Assigned to the 19th through 24th bits of the OUI.
Six bit manufacturer’s model number.
Four bit manufacturer’s revision number. 0001 stands for
Rev. A, etc.
Description
1 = Next Page enabled.
0 = Next Page disabled.
This bit will be set internally after receiving 3 consecutive and
consistent FLP bursts.
1 = Remote fault supported.
0 = No remote fault.
Write as 0, ignore when read.
Full Duplex Flow Control.
1 = Advertise that the DTE(MAC) has implemented both the
optional MAC control sublayer and the pause function as
specified in clause 31 and annex 31 B of 802.3u.
0 = No MAC-based full duplex flow control.
The NetPHY™ 4LP device does not support 100BASE-T4
function, i.e., this bit ties to zero.
1 = 100BASE-TX with full duplex.
0 = No 100BASE-TX full duplex ability.
Default is set by Register 1.14.
1 = 100BASE-TX with half duplex.
0 = No 100BASE-TX half duplex capability.
Default is set by Register 1.13.
1 = 10 Mbps with full duplex.
0 = No 10Mbps full duplex capability.
Default is set by Register 1.12.
1 = 10 Mbps with half duplex.
0 = No 10 Mbps half duplex capability
Default is set by Register 1.11.
[00001] = IEEE 802.3
PHY Identifier 1 Register (Register 2)
PHY Identifier 2 Register (Register 3)
Am79C875
Read/
Read/
Read/
Write
Write
Write
RW
RW
RW
RW
RW
RW
RW
RW
RO
RO
RO
RO
RO
RO
RO
DPLX pin
DPLX pin
0022(H)
Default
Default
010101
010100
Default
Set by
Set by
00001
0001
0
0
0
0
0
0
1
1