Ethernet MAC
UG0331 User Guide Revision 15.0 432
12 ACKNOWLEDGE
2
Indicates link partner’s ability to comply with the message.
When ‘1’, Link Partner complies with message. When ‘0’, link
partner cannot comply with message.
11 TOGGLE Used to ensure synchronization with the link partner during next
page exchange. This bit always takes the opposite value to the
Toggle bit of the previously exchanged link code word. The initial
value in the first next page transmitted is the inverse of bit 11 in the
base link code word.
[10:0] MESSAGE /
UNFORMATTED
CODE FIELD
Message pages are formatted pages that carry a predefined
message code, which is enumerated in the IEEE 802.3u/Annex
28C.
Unformatted code fields take an arbitrary value.
Table 432 • EXTENDED STATUS
Bit Number Name Reset Value Description
15 1000BASE-X
FULL-DUPLEX
0x1 When ‘1’, indicates that the PHY can operate in 1000BASE-X
Full-duplex mode. When ‘0’, indicates that the PHY cannot operate
in 1000BASE-X Full-duplex mode.
14 1000BASE-X
HALF-DUPLEX
0x0 When ‘1’, indicates that the PHY can operate in 1000BASE-X
Half-duplex mode. When ‘0’, indicates that the PHY cannot operate
in 1000BASE-X Half-duplex mode.
13 1000BASE-T
FULL-DUPLEX
0x1 When ‘1’, indicates that the PHY can operate in 1000BASE-T
Full-duplex mode. When ‘0’, indicates that the PHY cannot operate
in 1000BASE-T Full-duplex mode. Returns ‘1’ on read.
12 1000BASE-T
HALF-DUPLEX
0x0 When ‘1’, indicates that the PHY can operate in 1000BASE-T
Half-duplex mode. When ‘0’, indicates PHY cannot operate in
1000BASE-T Half-duplex mode.
[11:0] Reserved 0x0 Reserved.
Table 431 • AN NEXT PAGE TRANSMIT (continued)
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