78Q2123/78Q2133 MicroPHY™
10/100BASE-TX Transceiver
MR4: Auto-Negotiation Advertisement Register
BIT
SYMBOL TYPE DEFAULT DESCRIPTION
4.15
NP
RSVD
RF
R
R
0
0
0
Next Page: Not supported. Reads logic zero.
4.14
4.13
Reserved
R/W
Remote Fault: Setting this bit to ‘1’ allows the device to indicate to the
link partner a Remote Fault Condition.
4.12
4.11
A7
A6
R
0
0
Reserved.
R/W
Asymmetric PAUSE Support Indication for Full Duplex Links. Default is
0 indicating not supported. If the MAC supports Asymmetric PAUSE,
this bit can be written as 1. Writing to this register has no effect until
auto-negotiation is re-initiated.
4.10
A5
R
0
PAUSE Support Indication for Full Duplex Links. Default is 0 indicating
not supported. If the MAC supports PAUSE, this bit can be written as 1.
Writing to this register has no effect until auto-negotiation is re-initiated
4.9
4.8
A4
A3
R
0
100BASE-T4: The 78Q2123/78Q2133 do not support 100BASE-T4
operation.
R/W
(1)
100BASE-TX Full Duplex: If the MR1.14 bit is ‘1’, this bit will be set to
‘1’ upon reset and will be writeable. Otherwise, this bit cannot be set to
‘1’ by the management.
4.7
4.6
A2
A1
R/W
R/W
R/W
R
(1)
(1)
100BASE-TX: If the MR1.13 bit is ‘1’, this bit will be set to ‘1’ upon
reset and will be writeable. Otherwise, this bit cannot be set to ‘1’ by
the management.
10BASE-T Full Duplex: If the MR1.12 bit is ‘1’, this bit will be set to ‘1’
upon reset and will be writeable. Otherwise, this bit cannot be set to ‘1’
by the management.
4.5
A0
(1)
10BASE-T: If the MR1.11 bit is ‘1’, this bit will be set to ‘1’ upon reset
and will be writeable. Otherwise, this bit cannot be set to ‘1’ by the
management.
4.4:0
S4:0
01h
Selector Field: Hard coded with the value of ‘00001’ for IEEE 802.3.
Note: Technology Ability Field: MR4.12:5 are the Technology Ability Field bits (A7:0). The default value of this
field is dependent upon the MR1.15:11 register bits. This field can be overwritten by management to auto-
negotiate to an alternate common technology. Writing to this register has no effect until auto-negotiation is re-
initiated.
Page: 15 of 42
© 2009 Teridian Semiconductor Corporation
Rev 1.5
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
