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DP8422V bảng dữ liệu(PDF) 20 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện DP8422V
Giải thích chi tiết về linh kiện  microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers
PDF  60 Pages
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
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DP8422V bảng dữ liệu(HTML) 20 Page - National Semiconductor (TI)

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40 Port A Access Modes (Continued)
453 Delay CAS during Write Accesses
Address bit C9 asserted during programming will cause CAS
to be delayed until the first positive edge of CLK after RAS
is asserted when the input WIN is asserted Delaying CAS
during write accesses ensures that the data to be written to
DRAM will be setup to CAS asserting as shown in
Figures
12a and 12b If the possibility exists that data still may not
be present after the first positive edge of CLK CAS can be
delayed further with the ECAS inputs If address bit C9 is
negated during programming read and write accesses will
be treated the same (with regard to CAS)
TLF11109 – 19
FIGURE 12a Mode 0 Delay CAS
TLF11109 – 20
FIGURE 12b Mode 1 Delay CAS
20



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