78Q2120C09-DB Maxim Integrated Products, 78Q2120C09-DB Datasheet - Page 14

• Manufacturer Part Number: 78Q2120C09-DB
• Description: BOARD DEMO 787Q2120C
• Manufacturer: Maxim Integrated Products

Specifications of 78Q2120C09-DB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MR4: Auto-Negotiation Advertisement Register
Page: 14 of 35
4.12:5
4.4:0
4.15
4.14
4.13
4.12
4.11
4.10
BIT
4.9
4.8
4.7
4.6
4.5
SYMBOL TYPE DEFAULT DESCRIPTION
RSVD
S4:0
TAF
NP
RF
A7
A6
A5
A4
A3
A2
A1
A0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
(0Fh)
01h
(1)
(1)
(1)
(1)
0
0
0
0
0
0
0
©
Next Page: Not supported. Reads logic zero.
Reserved
Remote Fault: Setting this bit to ‘1’ allows the device to indicate to
the link partner a Remote Fault Condition.
Technology Ability Field: 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.
Reserved for future technology.
Reserved
Reserved.
100BASE-T4:
operation.
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.
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.
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.
Selector Field: Hard coded with the value of ‘00001’ for IEEE 802.3.
2009 Teridian Semiconductor Corporation
The 78Q2120C does not support 100BASE-T4
10/100BASE-TX
Transceiver
78Q2120C
Rev 1.3