Technical data

1.5.9 Auto Negotiation Next Page Transmit Register
15 14 13 12 11 10 9 8 No. Initial value
Next
Page
Reserved Message
Page
Acknowle
dge 2
Toggle Message/Unformatted Code
field
7 2001H
7 6 5 4 3 2 1 0
Message/Unformatted Code field
Table 29: Auto-Negotiation Next Page Transmit Register Overview
Bit position Bit name R/W Function
15 Next Page R/W Next Page
Indicates if next page with link information exists.
Next Page Next page indication
0
b
No next page exists (initial value)
1
b
Next page exists
14 - R Reserved
Write 0
b
; ignore on read access
13 Message
Page
R/W Message Page
Page type indication
Message Page Page type indication
0
b
Next page is an unformatted page
1
b
Next page is a message page (initial value)
12 Acknowl
edge 2
R/W
A
cknowledge 2
Indicates if device complies to message
Acknowledge 2 Message compliance indication
0
b
Device does not comply to message (initial value)
1
b
Device complies to message
11 Toggle R Toggle
Indicates, if the toggle bit of the previous page equalled 0
b
or 1
b
; this function
is used by the next page arbitration protocol.
Toggle Toggle bit indication
0
b
Toggle bit in the previously transmitted link code
word has been 1
b
(initial value)
1
b
Toggle bit in the previously transmitted link code
word has been 0
b
10:0 Message/
Unformatted
Code field
R/W Message/Unformatted Code field
Contains a message or unformatted 11-bit code word to be transmitted to the
link partner. The default message, that is stored in this field after reset, is the
Null message (001H).
Table 30: Auto-Negotiation Next Page Transmit Register Description
Copyright © Siemens AG 2008. All rights reserved. Page 41 ERTEC 200 PHY
Technical data subject to change Version 1.0.0