Specifications

DP83848Q-Q1

SNLS341C –MARCH 2011–REVISED MARCH 2015

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5.6.1.9 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 5-17. Auto-Negotiation Next Page Transmit Register (ANNPTR), address 0x07h

BIT BIT NAME DEFAULT DESCRIPTION

15 NP 0, RW Next Page Indication:

0 = No other Next Page Transfer desired.

1 = Another Next Page desired.

14 RESERVED 0, RO RESERVED: Writes ignored, read as 0.

13 MP 1, RW Message Page:

1 = Message Page.

0 = Unformatted Page.

12 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.

11 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>, RW 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 "Unformatted 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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