Cs8952 – Cirrus Logic CS8952 User Manual
Page 37
CS8952
CrystalLAN™ 100BASE-X and 10BASE-T Transceiver
37
DS206F1
6.5
Auto-Negotiation Advertisement Register - Address 04h
15
14
13
12
11
10
9
8
Next Page
Acknowledge
Remote Fault
Technology Ability Field
7
6
5
4
3
2
1
0
Technology Ability Field
Protocol Selector Field
BIT
NAME
TYPE
RESET
DESCRIPTION
15
Next Page
Read/Write 0
When set, this bit enables the ability to exchange
Next-Pages with the link partner. This bit should be
cleared if it is not desired to engage in Next Page
exchange.
Note: This bit is disabled, and writes to this bit are
ignored when the National Compatibility Mode bit of
the 10BASE-T Configuration Register (address 1Ch)
is set.
14
Acknowledge
Read Only
0
When set, this bit indicates consistent reception of
the link partner’s data.
13
Remote Fault
Read/Write 0
This bit may be used to indicate a fault condition to
the link partner. Setting this bit will signal to the link
partner that a fault condition has occurred.
12:5
Technology Ability
Field
Read/Write 0000 1111
This field determines the advertised capabilities of
the CS8952 as shown below. When the bit is set, the
corresponding technology will be advertised during
auto-negotiation.
BIT Capability
12 Reserved
11 Reserved
10 PAUSE operation for full duplex links. Set only
if supported by the host MAC.
9 100BASE-T4 (Note: this technology is not
supported and can not be set.
8 100BASE-TX Full Duplex
7 100Base-TX Half Duplex
6 10BASE-T Full Duplex
5 10BASE-T Half Duplex
4:0
Protocol Selector
Field
Read/Write 0 0001
This field is used to identify the type of message
being sent by auto-negotiation. This field defaults to
a value of “00001” for IEEE 802.3 messages.