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DP83255AVF Datasheet(PDF) 46 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP83255AVF
Description  PLAYER Device (FDDI Physical Layer Controller)
PDF  96 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83255AVF Datasheet(HTML) 46 Page - National Semiconductor (TI)

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50 Registers (Continued)
LINK ERROR THRESHOLD REGISTER (LETR)
The Link Error Threshold Register contains the start value for the Link Error Monitor Counter which is an 8-bit down-counter that
decrements if link errors are detected
When the Counter reaches 0 the Link Error Monitor Threshold Register value is loaded into the Link Error Monitor Counter and
the Link Error Monitor Threshold bit (LEMT) of the Interrupt Condition Register (ICR) is set to 1
The Link Error Monitor Threshold Register value is also loaded into the Link Error Monitor Counter during every Control Bus
Interface write-cycle of LETR
The Counter is initialized to 0 during the reset process (ie RST e GND)
ACCESS RULES
ADDRESS
READ
WRITE
15h
Always
Always
D7
D6
D5
D4
D3
D2
D1
D0
LET7
LET6
LET5
LET4
LET3
LET2
LET1
LET0
Bit
Symbol
Description
D0
LET0
LINK ERROR THRESHOLD BIT k0l
Least significant bit of the start value
for the Link Error Monitor Counter
D1–6
LET1–6
LINK ERROR THRESHOLD BIT k1–6l
Intermediate bits of start value for
the Link Error Monitor Counter
D7
LET7
LINK ERROR THRESHOLD BIT k7l
Most significant bit of the start value
for the Link Error Monitor Counter
46



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