78Q8430 Data Sheet
DS_8430_001
Bits
7
Symbol
A2
Type Default Description
R/W 100BASE-TX Half Duplex
1
This bit will be set to 1 upon reset and is writeable. Writing to
this register has no effect until auto-negotiation is re-initiated.
6
A1
R/W
R/W
R
1
1
10BASE-T Full Duplex
This bit will be set to 1 upon reset and is writeable. Writing to
this register has no effect until auto-negotiation is re-initiated.
5
A0
10BASE-T
This bit will be set to 1 upon reset and is writeable. Writing to
this register has no effect until auto-negotiation is re-initiated.
4:0
S4:0
01h
Protocol Selector Field
The value is 00001 for IEEE 802.3.
7.7.6 PHY Auto-Negotiation Line Partner Ability Register – MR5
Bits
Symbol
Type Default Description
15
NP
R
0
Next Page
When 1 is read, it indicates the link partner wishes to engage in
Next Page exchange.
14
ACK
R
0
Acknowledge
When 1 is read, it indicates the link partner has successfully
received at least 3 consecutive and consistent FLP bursts.
13
RF
R
R
0
0
Remote Fault
When 1 is read, it indicates the link partner has a fault.
12:5
A7:0
Technology Ability Field
This field contains the technology ability of the link partner.
The bit definition is the same as MR4.12:5.
4:0
S4:0
R
00h
Selector Field
This field contains the type of message sent by the link partner.
For IEEE 802.3 compliant link partner, this field should be
00001.
When MR5 contains a next page message, the bit definition is the same as MR7.
7.7.7 PHY Auto-Negotiation Expansion Register – MR6
Bits
15:5
4
Symbol
RSVD
PDF
Type Default
Description
R
0
0
Reserved
RC/LH
Parallel Detection Fault
When 1 is read, it indicates that more than one technology has
been detected during link up. This bit is cleared when read.
3
2
1
LPNPA
NPA
R
R
0
0
0
Link Partner Next Page Able
When 1 is read, it indicates the link partner supports the Next
Page function.
Next Page Able
Reads 0 since the 78Q8430 PHY does not support the Next
Page function.
PRX
RC/LH
Page Received
Reads 1 when a new link code word has been received into the
Auto-negotiation Link Partner Ability Register. This bit is
cleared upon read.
6.0
LPANEGA
R
0
Link Partner Auto-negotiation Able
When 1 is read, it indicates the link partner is able to participate
in the Auto-Negotiation function.
78
Rev. 1.2
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
