LXT972 Level One, LXT972 Datasheet - Page 54

• Manufacturer Part Number: LXT972
• Description: 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
• Manufacturer: Level One

LXT972 3.3V Dual-Speed Fast Ethernet Transceiver
Table 41: Auto Negotiation Advertisement Register (Address 4)
54
4.15
4.14
4.13
4.12
4.11
4.10
4.9
4.8
4.7
4.6
4.5
4.4:0
1. R/W = Read/Write
2. Default value of bit 4.10 is determined by pin 33/H8.
3. Default values of bits 4.5, 4.6, 4.7, and 4.8 are determined by LED/CFGn pins at reset. Refer to
Bit
RO = Read Only
Next Page
Reserved
Remote Fault
Reserved
Asymmetric
Pause
Pause
100BASE-T4
100BASE-TX
full-duplex
100BASE-TX 1 = Port is 100BASE-TX capable.
10BASE-T
full-duplex
10BASE-T
Selector Field,
S<4:0>
Name
1 = Port has ability to send multiple pages.
0 = Port has no ability to send multiple pages.
Ignore.
1 = Remote fault.
0 = No remote fault.
Ignore.
Pause operation defined in Clause 40 and 27.
1 = Pause operation enabled for full-duplex links.
0 = Pause operation disabled.
1 = 100BASE-T4 capability is available.
0 = 100BASE-T4 capability is not available.
(The LXT972 does not support 100BASE-T4 but allows this bit to be
set to advertise in the Auto-Negotiation sequence for 100BASE-T4
operation. An external 100BASE-T4 transceiver could be switched in
if this capability is desired.)
1 = Port is 100BASE-TX full-duplex capable.
0 = Port is not 100BASE-TX full-duplex capable.
0 = Port is not 100BASE-TX capable.
1 = Port is 10BASE-T full-duplex capable.
0 = Port is not 10BASE-T full-duplex capable.
1 = Port is 10BASE-T capable.
0 = Port is not 10BASE-T capable.
<00001> = IEEE 802.3.
<00010> = IEEE 802.9 ISLAN-16T.
<00000> = Reserved for future Auto-Negotiation development.
<11111> = Reserved for future Auto-Negotiation development.
Unspecified or reserved combinations should not be transmitted.
Description
Table 8
for details.
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
1
Default
Note 2
Note 3
Note 3
Note 3
Note 3
00001
0
0
0
0
0
0