There are two types of programmable interval timer are generally used. Intel 8253 is a programmable interval Timer/Counter which can generate accurate time delays and wave forms ranging from 0 Hz using software control. 8523 is its upgraded version which can operate with higher clock frequency range (DC - 8 MHz) and it is pin to pin compatible with 8253.
What is programmable interval timer ?
There are two types of programmable interval timer are generally used. Intel 8253 is a programmable interval Timer/Counter which can generate accurate time delays and wave forms ranging from 0 Hz using software control. 8523 is its upgraded version which can operate with higher clock frequency range (DC - 8 MHz) and it is pin to pin compatible with 8253.
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