CS8952 Datasheet, PDF (38/82 Pages) Cirrus Logic – CrystalLAN 100BASE-X and 10BASE-T Transceiver

CS8952
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
15 Next Page
TYPE
Read/Write 0
RESET
DESCRIPTION
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.
14 Acknowledge
13 Remote Fault
Read Only 0
Read/Write 0
12:5 Technology Ability Read/Write 0000 1111
Field
4:0 Protocol Selector Read/Write 0 0001
Field
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.
When set, this bit indicates consistent reception of
the link partner’s data.
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.
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
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.
38
CrystalLAN™ 100BASE-X and 10BASE-T Transceiver