25
ICS1890
Auto-Negotiation Advertisement Register (register 4
[0x04]
)
Auto-Negotiation Advertisement Register
(register 4)
The Auto-Negotiation advertisement register is a 16-bit read/
write register used to indicate the basic capabilities of the
local device. The values written into this register are exchanged
with the remote link partner to determine the best link technol-
ogy to enable. Normally it is desirable to advertise all of the
capabilities supported by a node. In some cases a certain
technology is not desired and in this case the corresponding
bit can be set to logic zero. If a connection cannot be made in
this case, management should enable all of the capabilities
possessed and restart Auto-Negotiation.
Next Page (bit 15)
The
ICS1890
does not support the next page function. This bit
is permanently set to a logic zero.
Reserved by IEEE (bit 14)
This reserved bit has no effect on the
ICS1890
. When read,
a logic zero is always returned.
Bit
Definition
When bit=0
When bit=1
Access
Default
Hex
15
Next Page
always 0 - not capable of
sending next pages
RO
0
0
14
Reserved by IEEE
always 0
RO
0
13
Fault Indication to link partner
no fault
a fault has occurred locally
RW
0
12
Technology Ability Field bit A7
reserved by IEEE
CW
0
11
Technology Ability Field bit A6
reserved by IEEE
CW
0
1
10
Technology Ability Field bit A5
reserved by IEEE
CW
0
9
TAF bit A4: 100Base-T4 Capability
always 0 - 100Base-T4 not
supported
RO
0
8
TAF A3: 100Base-TX Full Duplex
Capability
100Base-TX FD not desired
100Base-TX FD supported
RW
1
7
TAF A2: 100Base-TX Half Duplex
Capability
100Base-TX HD not desired 100Base-TX HD supported
RW
1
E
6
TAF A1: 10Base-T Full Duplex
Capability
10Base-T FD not desired
10Base-T FD supported
RW
1
5
TAF A0: 10Base-T Half Duplex
Capability
10Base-T HD not supported
10Base-T HD supported
RW
1
4
Selector Field bit S4
IEEE 802.3 default
CW
0
3
Selector Field bit S3
IEEE 802.3 default
CW
0
1
2
Selector Field bit S2
IEEE 802.3 default
CW
0
1
Selector Field bit S1
IEEE 802.3 default
CW
0
0
Selector Field bit S0
IEEE 802.3 default
CW
1
Summary of Contents for PHYceiver ICS1890
Page 49: ...49 ICS1890 Pin Configuration...