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DP8432V Datasheet(PDF) 14 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP8432V
Description  microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers
PDF  56 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP8432V Datasheet(HTML) 14 Page - National Semiconductor (TI)

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40 Port A Access Modes (Continued)
43 EXTENDING CAS WITH EITHER ACCESS MODE
In both access modes once AREQ is negated RAS and
DTACK if programmed will be negated If ECAS0 was as-
serted (0) during programming CAS (CASs) will be negated
with AREQ If ECAS0 was negated (1) during programming
CAS (CASs) will continue to be asserted after RAS has
been negated given that the appropriate ECAS inputs are
asserted This allows a DRAM to have data present on the
data out bus while gaining RAS precharge time
TLF11118 – 10
FIGURE 9a Access Mode 0 Extending CAS
TLF11118 – 11
FIGURE 9b Access Mode 1 Extending CAS
14



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