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The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
book

The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition

by Lyla B. Das
May 2024
Intermediate to advanced
665 pages
23h 2m
English
Pearson India
Content preview from The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
PERIPHERAL INTERFACING – II 363
10.1.11 | Reading a Count
In many applications, it may be important to read the contents of the count-register.  is can
be done by stopping the counting. To stop the counting, the method is to make the GATE pin
equal to 0, or to inhibit the clock. However, the better method is to do the reading ‘on the fl y’
which does not cause any interference on the circuit operation. Referring to Fig 10.3 shows that
there is a latch associated with the counting element. To read a stable value from a counter, the
method is to latch the count and then read the content of the latch. Refer to Fig 10.4 which
shows the control ...
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ISBN: 9781282663169