SMSC LAN9312 - Manual (Page 254)

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08) 254 SMSC LAN9312
DATASHEET
14.2.8.6 Virtual PHY Auto-Negotiation Link Partner Base Page Ability Register (VPHY_AN_LP_BASE_ABILITY)
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.
Offset:
Index (decimal): 1D4h
5 Size: 32 bits
BITS DESCRIPTION TYPE DEFAULT
31:16 RESERVED
(See
Note 14.33 )
RO -
15 Next Page
This bit indicates the emulated link partner PHY next page capability and is
always 0.
0: Link partner PHY does not advertise next page capability
1: Link partner PHY advertises next page capability
RO 0b
Note 14.34
14 Acknowledge
This bit indicates whether the link code word has been received from the
partner and is always 1.
0: Link code word not yet received from partner
1: Link code word received from partner
RO 1b
Note 14.34
13 Remote Fault
Since there is no physical link partner, this bit is not used and is always
returned as 0. RO 0b
Note 14.34
12 RESERVED RO -
11 Asymmetric Pause
This bit indicates the emulated link partner PHY asymmetric pause
capability.
0: No Asymmetric PAUSE toward link partner
1: Asymmetric PAUSE toward link partner
RO Note 14.35
10 Pause
This bit indicates the emulated link partner PHY symmetric pause capability.
0: No Symmetric PAUSE toward link partner
1: Symmetric PAUSE toward link partner
RO Note 14.35
9 100BASE-T4
This bit indicates the emulated link partner PHY 100BASE-T4 capability.
This bit is always 0.
0: 100BASE-T4 ability not supported
1: 100BASE-T4 ability supported
RO 0b
Note 14.34
8 100BASE-X Full Duplex
This bit indicates the emulated link partner PHY 100BASE-X full duplex
capability.
0: 100BASE-X full duplex ability not supported
1: 100BASE-X full duplex ability supported
RO Note 14.36