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The control word register contents are used for

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in Microprocessor by (39.4k points)
The control word register contents are used for

(a) initializing the operating modes

(b) selection of counters

(c) choosing binary/BCD counters

(d) all of the mentioned

The question was posed to me in class test.

This interesting question is from Programmable Interval Timer 8254 topic in chapter Special Purpose Programmable Peripheral devices and their Interfacing of Microprocessor

1 Answer

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by (49.2k points)
The correct option is (d) all of the mentioned

Best explanation: The control word register contents are used for

i) initializing the operating modes (mode 0-mode 4)

ii) selection of counters (counter0-counter2)

iii) choosing binary or BCD counters

iv) loading of the counter registers.

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