NSC800N datasheet(18/76 Pages) NSC

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NSC800N Arkusz danych(PDF) 18 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.

Numer części	NSC800N

Szczegółowy opis	NSC800TM High-Performance Low-Power CMOS Microprocessor

PDF	76 Pages

Scroll/Zoom	100%

Producent	NSC [National Semiconductor (TI)]

Strona internetowa	http://www.national.com

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18 / 76 page

90 Timing and Control (Continued)

Figure 10 shows the timing for memory read (other than

opcode fetchs) and write cycles with and without a wait

state The RD stobe is widened by

(half the machine

state) for memory reads so that the actual latching of the

input data occurs later

Figure 11 shows the timing for input and output cycles with

and without wait states The CPU automatically inserts one

wait state into each IO instruction to allow sufficient time

for an IO port to decode the address

TLC5171 – 19

FIGURE 11a Input and Output Cycles without WAIT States

TLC5171 – 20

WAIT state automatically inserted during IO operation

FIGURE 11b Input and Output Cycles with WAIT States

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