LAN9312 datasheet(256/458 Pages) SMSC

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High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

Revision 1.2 (04-08-08)

256

SMSC LAN9312

DATASHEET

14.2.8.7

Virtual PHY Auto-Negotiation Expansion Register (VPHY_AN_EXP)

This register is used in the Auto-Negotiation process.

Note 14.37

The reserved bits 31-16 are used to pad the register to 32-bits so that each register is on

a DWORD boundary. When accessed serially (through the MII management protocol), the

Note 14.38

Since the Virtual PHY link partner is emulated, there is never a Parallel Detection Fault

and this bit is always 0.

Note 14.39

Next page ability is not supported by the Virtual PHY or emulated link partner.

Note 14.40

The page received bit is clear when read. It is first cleared on reset, but set shortly

thereafter when the Auto-Negotiation process is run.

Note 14.41

The emulated link partner will show Auto-Negotiation able unless Auto-Negotiation fails (no

common bits between the advertised ability and the link partner ability).

Offset:

Index (decimal):

1D8h

Size:

32 bits

BITS

DESCRIPTION

TYPE

DEFAULT

31:16

RESERVED

(See Note 14.37)

15:5

RESERVED

Parallel Detection Fault

This bit indicates whether a Parallel Detection Fault has been detected. This

bit is always 0.

0: A fault hasn’t been detected via the Parallel Detection function

1: A fault has been detected via the Parallel Detection function

Note 14.38

Link Partner Next Page Able

This bit indicates whether the link partner has next page ability. This bit is

always 0.

0: Link partner does not contain next page capability

1: Link partner contains next page capability

Note 14.39

Local Device Next Page Able

This bit indicates whether the local device has next page ability. This bit is

always 0.

0: Local device does not contain next page capability

1: Local device contains next page capability

Note 14.39

Page Received

This bit indicates the reception of a new page.

0: A new page has not been received

1: A new page has been received

RO/LH

Note 14.40

Link Partner Auto-Negotiation Able

This bit indicates the Auto-negotiation ability of the link partner.

0: Link partner is not Auto-Negotiation able

1: Link partner is Auto-Negotiation able

Note 14.41

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