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參數(shù)資料
| 型號： | 78Q8430EBST#DB |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 76/88頁 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD 78Q8430 |
| 標準包裝： | 1 |
| 系列： | * |
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78Q8430 Data Sheet
DS_8430_001
78
Rev. 1.2
Bits
Symbol
Type
Default Description
7
A2
R/W
1
100BASE-TX Half 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.
6
A1
R/W
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
R/W
1
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
R
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
0
Remote Fault
When 1 is read, it indicates the link partner has a fault.
12:5
A7:0
R
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
Symbol
Type
Default
Description
15:5
RSVD
R
0
Reserved
4
PDF
RC/LH
0
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
LPNPA
R
0
Link Partner Next Page Able
When 1 is read, it indicates the link partner supports the Next
Page function.
2
NPA
R
0
Next Page Able
Reads 0 since the 78Q8430 PHY does not support the Next
Page function.
1
PRX
RC/LH
0
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.
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