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Cortina Systems LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
LXT9785/LXT9785E
Datasheet
249241, Revision 11.0
16 April 2007
7.0 Register Definitions
Table 91
Auto-Negotiation Next Page Transmit Register (Address 7)
Bit
Name
Description
Type1
Default
15
Next Page
(NP)
0 = Last page
1 = Additional next pages follow
R/W
0
14
Reserved
Write as 0, ignore on Read.
R
0
13
Message Page
(MP)
0 = Unformatted page
1 = Message page
R/W
1
12
Acknowledge 2
(ACK2)
0 = Cannot comply with message
1 = Complies with message
R/W
0
11
Toggle
(T)
0 = Previous value of the transmitted link code word
equalled logic one
1 = Previous value of the transmitted link code word
equalled logic zero
R0
10:0
Message/
Unformatted
Code Field
MP = 0: Code interpreted as “unformatted page”
MP = 1: Code interpreted as “message page”
R/W
0000000
0001
1. R/W = Read Write, R = Read Only
Table 92
Auto-Negotiation Link Partner Next Page Receive Register (Address 8)
Bit
Name
Description
Type1
Default2
15
Next Page
(NP)
0 = Link partner has no additional next pages to send
1 = Link partner has additional next pages to send
R0
14
Acknowledge
(ACK)
0 = Link partner has not received Link Code Word from
the LXT9785/LXT9785E
1 = Link partner has received Link Code Word from the
LXT9785/LXT9785E
R0
13
Message Page
(MP)
0 = Page sent by the link partner is an unformatted page
1 = Page sent by the link partner is a message page
R0
12
Acknowledge 2
(ACK2)
0 = Link partner cannot comply with the message
1 = Link partner complies with the message
R0
11
Toggle
(T)
0 = Previous value of the transmitted Link Code Word
equalled logic one
1 = Previous value of the transmitted Link Code Word
equalled logic zero
R0
10:0
Message/
Unformatted
Code Field
MP = 1: Code interpreted as message page
MP = 0: Code interpreted as unformatted page
R
0x000
1. R = Read Only
2. Default value at the start of auto-negotiation code word transmission.