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DP83256 Datasheet(PDF) 80 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP83256
Description  PLAYERa??Device (FDDI Physical Layer Controller)
PDF  144 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83256 Datasheet(HTML) 80 Page - National Semiconductor (TI)

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50 Registers (Continued)
536 SCRUB TIMER THRESHOLD REGISTER (STTR)
This is the threshold value of the internal scrub timer It has a resolution of 4096 ms and a maximum value of E10 ms When
the scrub timer reaches zero the Scrub Timer Expired (CMTCRSTE) bit is set
Scrubbing is initiated when MODE2ESTCe1 and a trigger condition occurs
Writing to STTR during scrubbing will not affect the scrubbing action
ACCESS RULES
ADDRESS
READ
WRITE
24h
Always
Always
D7
D6
D5
D4
D3
D2
D1
D0
STT7
STT6
STT5
STT4
STT3
STT2
STT1
STT0
Bit
Symbol
Description
D0 – D7
STT0 – STT7
SCRUB TIMER THRESHOLD BITk0-7l
Scrub Timer threshold
STT0 is the Least Significant Bit (LSB)
80



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