
152
Agere Systems Inc.
T8302 Internet Protocol Telephone
Advanced RISC Machine (
ARM
)
Data Sheet
July 2001
12 Ethernet 10/100 PHY(s)
(continued)
12.5.8 MR5 Autonegotiation Link Partner (LP) Ability Register (Next Page) Bit Description
Table 133. MR5 Autonegotiation Link Partner (LP) Ability Register (Next Page) Bit Description
12.5.9 MR6 Autonegotiation Expansion Register Bit Description
Table 134. MR6 Autonegotiation Expansion Register Bit Description
* LH = latched high.
Bit #
15
Name
Type
R
Description
LP_NEXT_PAGE
Next page.
A logic 0 indicates that this is the last page to be transmitted.
A logic 1 indicates that additional pages will follow.
Acknowledge. When this bit is set to a logic 1, it indicates that the link
partner has successfully received its partner’s link code word.
Message page.
This bit is used by the
NEXT _PAGE
function to differenti-
ate a message page (logic 1) from an unformatted page (logic 0).
Acknowledge 2.
This bit is used by the
NEXT_PAGE
function to indicate
that a device has the ability to comply with the message (logic 1) or not
(logic 0).
Toggle.
This bit is used by the arbitration function to ensure synchroniza-
tion with the link partner during next-page exchange.
14
LP_ACK
R
13
LP_MES_PAGE
R
12
LP_ACK2
R
11
LP_TOGGLE
R
Logic 0 indicates that the previous value of the transmitted link code word
was logic 1.
Logic 1 indicates that the previous value of the transmitted link code word
was logic 0.
Message/unformatted code field. With these 11 bits, there are 2048 pos-
sible messages. Message code field definitions are described in annex
28C of the
IEEE
802.3u 1995 standard.
10:0
MCF
R
Bit #
15:5
4
Name
RESERVED
PAR_DET_FAULT
Type
R
R/LH*
Description
Reserved.
Parallel detection fault.
When this bit is set to 1, it indicates that a
fault has been detected in the parallel detection function. This fault
is due to more than one technology detecting concurrent link condi-
tions.
This bit can only be cleared by reading this register.
Link partner next page able.
When this bit is set to 1, it indicates
that the link partner supports the next page function.
Next page able.
This bit is set to 1 indicating that this device sup-
ports the
NEXT_PAGE
function.
Page received. When this bit is set to 1, it indicates that a
NEXT_PAGE
has been received
Link partner autonegotiation capable.
When this bit is set to 1, it
indicates that the link partner is autonegotiation capable.
3
LP_NEXT_PAGE_ABLE
R
2
NEXT_PAGE_ABLE
R
1
PAGE_REC
R/LH*
0
LP_NWAY_ABLE
R