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參數資料
| 型號： | LU3X54FTL |
| 英文描述： | QUAD-FET for 10Base-T/100Base-TX/FX |
| 中文描述： | 四核10Base-T/100Base-TX/FX場效應管 |
| 文件頁數： | 36/54頁 |
| 文件大小： | 677K |
| 代理商： | LU3X54FTL |
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LU3X54FT
QUAD-FET for 10Base-T/100Base-TX/FX
Data Sheet
July 2000
36
Lucent Technologies Inc.
MII Station Management
(continued)
Management Registers (MR)
(continued)
Table 19. MR28—Device-Specific Register 1 (Status Register) Bit Descriptions
1. Note that the format for the bit descriptions is as follows: the first number is the register number, the second number is the bit position in the
register, and the name of the instantiated pad is in capital letters.
2. R = read, LH = latched high.
Register/Bit
1
28.15:9 (R28[15:9])
28.8 (BAD_FRM)
Type
2
R
R/LH
Description
Unused.
Read as 0.
Bad Frame.
If this bit is a 1, it indicates a packet has been received without an
SFD. This bit is only valid in 10 Mbits/s mode.
This bit is latching high and will only clear after it has been read or the device
has been reset. This bit defaults to 0.
Code Violation.
When this bit is a 1, it indicates a Manchester code violation
has occurred. The error code will be output on the RXD lines. Refer to Table 3
for a detailed description of the RXD pin error codes. This bit is only valid in
10 Mbits/s mode.
28.7 (CODE)
R/LH
This bit is latching high and will only clear after it has been read or the device
has been reset. This bit defaults to 0.
Autopolarity Status.
When register 30, bit 3 is set and this bit is a 1, it indi-
cates the LU3X54FT has detected and corrected a polarity reversal on the
twisted pair.
28.6 (APS)
R
If the APF_EN bit (register 30, bit 3) is set, the reversal will be corrected inside
the LU3X54FT. This bit is not valid in 100 Mbits/s operation. This bit defaults
to 0.
Disconnect.
If this bit is a 1, it indicates a disconnect. This bit will latch high
until read. This bit is only valid in 100 Mbits/s mode. This bit defaults to 0.
Unlocked.
Indicates that the TX scrambler lost lock. This bit will latch high until
read. This bit is only valid in 100 Mbits/s mode. This bit defaults to 0.
RX Error Status.
Indicates a false carrier. This bit will latch high until read. This
bit is only valid in 100 Mbits/s mode. This bit defaults to 0.
Force Jam.
This bit will latch high until read. This bit is only valid in 100 Mbits/s
mode. This bit defaults to 0.
Link Up 100.
This bit, when set to a 1, indicates a 100 Mbits/s transceiver is up
and operational. This bit defaults to 0.
Link Up 10.
This bit, when set to a 1, indicates a 10 Mbits/s transceiver is up
and operational. This bit defaults to 0.
28.5 (DISCON)
R/LH
28.4 (UNLOCKED)
R/LH
28.3 (RXERR_ST)
R/LH
28.2 (FRC_JAM)
R/LH
28.1 (LNK100UP)
R
28.0 (LNK10UP)
R
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