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DP83256 датащи(PDF) 27 Page - Texas Instruments

номер детали DP83256
подробное описание детали  PLAYER(TM) Device (FDDI Physical Layer Controller)
PDF  146 Pages
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

DP83256 датащи(HTML) 27 Page - Texas Instruments

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30 Functional Description (Continued)
TABLE 3-5 Noise Event Description
Noise Event e
SD
 ECD a
SD
 CD  PI  E(II a JK a AB) a
SD
 CD  EPI  (PB e II)  AB
Where

e
Logical AND
ae
Logical OR
E
e
Logical NOT
SD
e
Signal Detect
CD
e
Clock Detect
PB
e
Previous Byte
PLS
e
Previous Line State
PI
e
PHY Invalid e HLS a QLS
a
MLS a NLS a ULS
 PLS
e
(ALS a ILS)
ILS
e
Idle Line State
ALS
e
Active Line State
ULS
e
Unknown Line State
HLS
e
Halt Line State
QLS
e
Quiet Line State
MLS
e
Master Line State
NLS
e
Noise Line State
ULS
e
Unknown Line State
I
e
Idle symbol
J
e
First symbol of start delimiter
K
e
Second symbol of start
delimiter
R
e
Reset symbol
S
e
Set symbol
T
e
End Delimiter
A
e
n a R a S a T
B
e
n a R a S a T a I
n
e
any data symbol
LINK ERROR MONITOR
Link Error Monitoring is accomplished in the PLAYERa de-
vice through the Link Error Monitor Counter The initial value
of this down counter is set using the Link Error Threshold
Register (LETR) A snapshot of the counter can be taken
with the Current Link Error Count Register (CLECR)
A Link Error is defined as follows
TABLE 3-6 Link Error Event Description
Link Error
ALS
 (IEI a xV a Vx a HEH) a
ALS
 ESD a ILS  E(II a JK) a
Event e
ILS
 ESD) a ULS  (PLSeALS) 
Link
Error
Flag
 ESB  E(HH a HI
a
II a JK)
Set Link
Error
Flag e ALS
 (HH a NH a RH a
SH a TH)
Clear Link
Error
Flag e ALS
 JK a
ILS
 JK a ULS  (PLSeALS  Link
Error
Flag
 ESB  E(HH a HI a II a
JK)
Where
E
e
Logical NOT
ae
Logical OR

e
Logical AND
ILS
e
Idle Line State
ALS
e
Active Line State
ULS
e
Unknown Line State
x
e
Any symbol
I
e
Idle symbol
H
e
Halt symbol
J
e
First symbol of start delimiter
K
e
Second symbol of start
delimiter
V
e
Violation symbol
R
e
Reset symbol
S
e
Set symbol
T
e
End delimiter symbol
N
e
Data symbol converted to
0000 by the PLAYERa device
Receiver Block in symbol pairs
that contain a data and a control
symbol
PLS
e
Previous Line State
SD
e
Signal Detect
SB
e
Stuff Byte Byte inserted by EB
before a JK symbol pair for
recentering or due to off-axis JK
26



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