WG82577LM S LGWR Intel, WG82577LM S LGWR Datasheet - Page 79
WG82577LM S LGWR
Manufacturer Part Number
WG82577LM S LGWR
Description
Manufacturer
Intel
Datasheet
1.WG82577LM_S_LGWR.pdf
(195 pages)
Specifications of WG82577LM S LGWR
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Programmer’s Visible State—82577 GbE PHY
Table 39.
Diagnostics Status Register (Linking Disabled) - Address 31
11
10
9:2
1:0
Bits
Short Between Pairs
X and B
Short Between Pairs
X and A
Distance to Fault
Pair Indication
Field
RO
RO
RO
RO
Type
0b
0b
0x0
00b
Default
The first time these bits are read after automatic
TDR analysis has completed, indicate a short
between pair A and pair A, B, C, and D,
respectively. The second time they are read,
indicate a short between pair B and pair A, B, C,
and D, respectively. The third time with pair C and
the fourth time with pair D. It then cycles back to
pair A. The pair indication bits (Register 31, bits
1:0) indicate to which pair the results correspond
to. Bits 13:12 of Register 30 can be used to specify
a pair other than pair A as the first dimension that
is reported.
1b = Short between pairs X and B.
0b = No short between pairs X and B.
The first time these bits are read after automatic
TDR analysis has completed, indicate a short
between pair A and pair A, B, C, and D,
respectively. The second time they are read,
indicate a short between pair B and pair A, B, C,
and D, respectively. The third time with pair C and
the fourth time with pair D. It then cycles back to
pair A. The pair indication bits (Register 31, bits
1:0) indicate to which pair the results correspond
to. Bits 13:12 of Register 30 can be used to specify
a pair other than pair A as the first dimension that
is reported.
1b = Short between pairs X and A.
0b = No short between pairs X and A.
Distance to first open, short, or SIM fault on pair X.
The first time this register is read, after automatic
TDR analysis has completed, it indicates the
distance to the first fault on pair A. The second time
it is read, it indicates the distance to the first fault
on pair B, the third time on pair C, and the fourth
time on pair D. It then cycles back to pair A. The
pair indication bits (Register 31, bits 1:0) indicate
to which pair the results correspond to. Bits 13:12
of Register 30 can be used to specify a pair other
than pair A as the first dimension that is reported.
This 8-bit integer value is the distance in meters.
The value 0xFF indicates an unknown result.
These bits indicate the pair to which the results in
bits 15:2 of Register 31 correspond to.
00b = results are for pair A.
01b = results are for pair B.
10b = results are for pair C.
11b = results are for pair D.
Description
72
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