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NSC800D Fiches technique(PDF) 18 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No de pièce NSC800D
Description  NSC800TM High-Performance Low-Power CMOS Microprocessor
PDF  76 Pages
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

NSC800D Fiches technique(HTML) 18 Page - National Semiconductor (TI)

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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
t
2
(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
18



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