SNLS638A December 2018 – August 2019 DP83825I
ANNPTR_Register is shown in Table 20.
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Next Page Indication:
0x0 = Do not advertise desire to send additional next pages
0x1 = Advertise desire to send additional next pages
0x0 = Current page is an unformatted page
0x1 = Current page is a message page
Acknowledge2: Acknowledge2 is used by the next page function to indicate that Local Device has the ability to comply with the message received.
0x0 = Cannot comply with message
0x1 = Will comply with message
Toggle: Toggle is used by the Arbiitration function within Auto-Negotiation to synchronize with the Link Parnter during Next Page exchange. This bit always takes the opposite value of the Toggle bit in the previously exchanged Link Code Word.
0x0 = Value of toggle bit in previously transmitted Link Code Word was 1
0x1 = Value of toggle bit in previously transmitted Link Code Word was 0
This field represents the code field of the next page transmission. If the Message Page bit is set (bit  of this register), then the code is interpreted as a Message Page, as defined in annex 28C of IEEE 802.3u. Otherwise, the code is interperated 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.