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DP8441VLJ-40 Scheda tecnica(PDF) 43 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte DP8441VLJ-40
Spiegazioni elettronici  microCMOS Programmable 16/64 Mbit Dynamic RAM Controller/Driver
PDF  46 Pages
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP8441VLJ-40 Scheda tecnica(HTML) 43 Page - National Semiconductor (TI)

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130 Errata for DP844041 (Continued)
ERRATUM
5
When operating in Page Mode an access cannot start on
the clock edge immediately following the negation of
DTACK If back-to-back accesses are done in this way the
CAS signals will remain low during a refresh as shown in the
timing diagram
Recommended Fix
There should be at least one idle clock between the nega-
tion of DTACK and the start of a new access
Illegal Back-to-Back Accesses in Page Mode
TLF11718 – 45
ERRATUM
6
When starting a page access there is a hold time from the
rising edge of the clock when ADS cannot assert This hold
time (parameter 423 in the datasheet) is 4 ns and only ap-
plies when operating in Page Mode
Recommended Fix
ADS assertion should be delayed at least 4 ns from the
rising edge of the clock when in Page Mode operation
Parameter 423 ADS Hold Time before Assertion
TLF11718 – 46
43



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