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Intel 8253 is a programmable timer and it can be interfaced to 8085. This can be used as a real time clock, square wave generator and this is possible because 8253 can create accurate time delays.

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Q: Intel 8253 memory chip interface to 8085?
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What is IC 8253?

The 8253 and 8254 are Programmable Interval Timers (PITs), which perform timing and counting functions.They were primarily designed for the Intel 8080/8085-processors, but later used in x86-systems.They (or an equivalent circuit embedded in a larger chip) are found in all IBM PC compatibles.


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In terms of computing, supporting chips are those chips in which provide input/output, serial communications, and direct memory access. Some of these chips include: 8251, 8253, and 8255.


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What is the function of sid and sod in 8088 processor?

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