Programmer’s Guide BCM5722
10/15/07
Broadcom Corporation
Document 5722-PG101-R Transceiver Registers Page 420
8 100BASE-TX Full-
Duplex Capability
When bit 8 of the auto-negotiation advertisement register is
written to 1, the BCM5722 Ethernet controller advertises
100BASE-TX full-duplex capability. When the bit is written to
0, the BCM5722 Ethernet controller advertises no 100BASE-
TX full-duplex capability. This bit returns a 1 when advertising
100BASE-TX full-duplex capability, otherwise, it returns a 0.
• 1 = 100BASE-TX full-duplex capable
• 0 = Not 100BASE-TX full-duplex capable
1R/W
7 100BASE-TX Half-
Duplex Capability
When bit 7 of the auto-negotiation advertisement register is
written to 1, the BCM5722 Ethernet controller advertises
100BASE-TX half-duplex capability. When the bit is written to
0, the BCM5722 Ethernet controller advertises no 100BASE-
TX half-duplex capability. This bit returns a 1 when
advertising 100BASE-TX half-duplex capability, otherwise, it
returns a 0.
• 1 = 100BASE-TX half-duplex capable
• 0 = Not 100BASE-TX half-duplex capable
1R/W
6 10BASE-T Full-Duplex
Capability
When bit 6 of the auto-negotiation advertisement register is
written to 1, the BCM5722 Ethernet controller advertises
10BASE-T full-duplex capability. When the bit is written to 0,
the BCM5722 Ethernet controller advertises no 10BASE-T
full-duplex capability. This bit returns a 1 when advertising
10BASE-T full-duplex capability, otherwise, it returns a 0.
• 1 = 10BASE-T full-duplex capable
• 0 = Not 10BASE-T full-duplex capable
1R/W
5 10BASE-T Half-Duplex
Capability
When bit 5 of the auto-negotiation advertisement register is
written to 1, the BCM5722 Ethernet controller advertises
10BASE-T half-duplex capability. When the bit is written to 0,
the BCM5722 Ethernet controller advertises no 10BASE-T
half-duplex capability. This bit returns a 1 when advertising
10BASE-T half-duplex capability, otherwise, it returns a 0.
• 1 = 10BASE-T half-duplex capable
• 0 = Not 10BASE-T half-duplex capable
1R/W
4:0 Selector Field Bits 4:0 of the auto-negotiation advertisement register
indicate the protocol type. The value 00001 indicates that the
BCM5722 Ethernet controller belongs to the 802.3 class of
PHY transceivers.
00001 indicates IEEE 802.3 CSMA/CD
00001 R/W
Table 482: Auto-Negotiation Advertisement Register (PHY_Addr = 0x1, Reg_Addr = 04h) (Cont.)
Bit Field Description Init Access
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