High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
14.2.8.6
Virtual PHY Auto-Negotiation Link Partner Base Page Ability Register (VPHY_AN_LP_BASE_ABILITY)
Offset:
Index (decimal):
1D4h
5
Size:
32 bits
This read-only register contains the advertised ability of the link partner’s PHY and is used in the Auto-
Negotiation process with the Virtual PHY. Because the Virtual PHY does not physically connect to an
actual link partner, the values in this register are emulated as described below.
BITS
DESCRIPTION
TYPE
DEFAULT
31:16
RESERVED
(See Note 14.33)
RO
-
15
14
13
Next Page
RO
RO
RO
0b
This bit indicates the emulated link partner PHY next page capability and is
always 0.
Note 14.34
0: Link partner PHY does not advertise next page capability
1: Link partner PHY advertises next page capability
Acknowledge
1b
This bit indicates whether the link code word has been received from the
partner and is always 1.
Note 14.34
0: Link code word not yet received from partner
1: Link code word received from partner
Remote Fault
0b
Since there is no physical link partner, this bit is not used and is always
returned as 0.
Note 14.34
12
11
RESERVED
RO
RO
-
Asymmetric Pause
This bit indicates the emulated link partner PHY asymmetric pause
capability.
Note 14.35
0: No Asymmetric PAUSE toward link partner
1: Asymmetric PAUSE toward link partner
10
9
Pause
RO
RO
Note 14.35
This bit indicates the emulated link partner PHY symmetric pause capability.
0: No Symmetric PAUSE toward link partner
1: Symmetric PAUSE toward link partner
100BASE-T4
0b
This bit indicates the emulated link partner PHY 100BASE-T4 capability.
This bit is always 0.
Note 14.34
0: 100BASE-T4 ability not supported
1: 100BASE-T4 ability supported
8
100BASE-X Full Duplex
This bit indicates the emulated link partner PHY 100BASE-X full duplex
capability.
RO
Note 14.36
0: 100BASE-X full duplex ability not supported
1: 100BASE-X full duplex ability supported
Revision 1.2 (04-08-08)
254
SMSC LAN9312
DATASHEET
SMSC [ SMSC CORPORATION ]
