DP83849IF datasheet(63/108 Pages) NSC

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7.1.9 Auto-Negotiation Next Page Transmit Register (ANNPTR)

This register contains the next page information sent by this device to its Link Partner during Auto-Negotiation.

Table 28. Auto-Negotiation Next Page Transmit Register (ANNPTR), address 07h

Bit

Bit Name

Default

Description

0, RW

Next Page Indication:

0 = No other Next Page Transfer desired.

1 = Another Next Page desired.

RESERVED

0, RO

RESERVED: Writes ignored, read as 0.

1, RW

Message Page:

1 = Message Page.

0 = Unformatted Page.

ACK2

0, RW

Acknowledge2:

1 = Will comply with message.

0 = Cannot comply with message.

Acknowledge2 is used by the next page function to indicate that

Local Device has the ability to comply with the message received.

TOG_TX

0, RO

Toggle:

1 = Value of toggle bit in previously transmitted Link Code Word

was 0.

0 = Value of toggle bit in previously transmitted Link Code Word

was 1.

Toggle is used by the Arbitration function within Auto-Negotiation

to ensure synchronization with the Link Partner during Next Page

exchange. This bit shall always take the opposite value of the

Toggle bit in the previously exchanged Link Code Word.

10:0

CODE

<000 0000 0001>,

Code:

This field represents the code field of the next page transmission.

If the MP bit is set (bit 13 of this register), then the code shall be

interpreted as a "Message Page”, as defined in annex 28C of

IEEE 802.3u. Otherwise, the code shall be interpreted as an "Un-

formatted Page”, and the interpretation is application specific.

The default value of the CODE represents a Null Page as defined

in Annex 28C of IEEE 802.3u.

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