Cs8952 – Cirrus Logic CS8952 User Manual
Page 33
CS8952
CrystalLAN™ 100BASE-X and 10BASE-T Transceiver
33
DS206F1
6.2
Basic Mode Status Register - Address 01h
15
14
13
12
11
10
9
8
100BASE-T4
100BASE-TX/
Full Duplex
100BASE-TX/
Half Duplex
10BASE-T/
Full Duplex
10BASE-T/
Half Duplex
Reserved
7
6
5
4
3
2
1
0
Reserved
MF Preamble
Suppression
Auto-Neg
Complete
Remote Fault
Auto-Neg
Ability
Link Status
Jabber Detect
Extended
Capability
BIT
NAME
TYPE
RESET
DESCRIPTION
15
100BASE-T4
Read Only
0
The CS8952 does not support 100BASE-T4 opera-
tion, so this bit will always read 0.
14
100BASE-TX/Full
Duplex
Read Only
1
When this bit is set, it indicates that the CS8952 is
capable of 100BASE-TX Full-Duplex operation. This
bit reflects the status of the 100BASE-TX/Full-Duplex
bit in the Auto-Negotiation Advertisement Register
(address 04h).
13
100BASE-TX/Half
Duplex
Read Only
1
When this bit is set, it indicates that the CS8952 is
capable of 100BASE-TX Half-Duplex operation. This
bit reflects the status of the 100BASE-TX/Half
Duplex bit in the Auto-Negotiation Advertisement
Register (address 04h).
12
10BASE-T/Full
Duplex
Read Only
1
When this bit is set, it indicates that the CS8952 is
capable of 10BASE-T Full-Duplex operation. This bit
reflects the status of the 10BASE-T/Full Duplex bit in
the Auto-Negotiation Advertisement Register
(address 04h).
11
10BASE-T/Half
Duplex
Read Only
1
When this bit is set, it indicates that the CS8952 is
capable of 10BASE-T Half-Duplex operation. This bit
reflects the status of the 10BASE-T/Half Duplex bit in
the Auto-Negotiation Advertisement Register
(address 04h).
10:7
Reserved
Read Only
0000
6
MF Preamble Sup-
pression
Read Only
1
When set, this bit indicates that the CS8952 is capa-
ble of accepting management frames regardless of
whether they are preceded by the preamble pattern.
When clear, it indicates that the management frame
must be preceded by the preamble pattern to be con-
sidered valid. This bit reflects the status of the MR
Preamble Enable bit in the PCS Sub-Layer Configu-
ration Register (address 17h).
5
Auto-Neg Complete Read Only
0
This bit is set to a 1 when the auto-negotiation pro-
cess has completed. This is an indication that data is
valid in the Auto-Negotiation Advertisement Register
(address 04h), the Auto-Negotiation Link Partner
Ability Register (address 05h), and the Auto-Negotia-
tion Expansion Register (address 06h).
4
Remote Fault
Read Only
0
When auto-negotiation is enabled, this bit is set if the
Remote Fault bit is set in the Auto-Negotiation Link
Partner Ability Register (address 05h). When auto-
negotiation is disabled, this bit will be set when a Far-
End Fault Indication for 100BASE-TX is detected.