PIC MICROCONTROLLER
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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CONNECTING EXTERNAL CRYSTAL
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CONNECTING EXTERNAL INTERRUPT
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CONNECTING EXTERNAL RESET
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CONNECTING COUNTER INPUT
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Detailed explanation-1: -OSC1 & OSC2 are the main oscillator inputs. T1OSO & T1OSI are intended for implementing an independant oscillator for TIMER1. Section 2.6 in the datasheet shows that you can use the TIMER1 oscillator as a clock input, by setting the SCS bit in the OSCCON register.
Detailed explanation-2: -The external crystal resonator is connected across the EXTAL and XTAL pins of the MCU.
Detailed explanation-3: -Oscillators are responsible for supplying the clock signals in microcontrollers. All the instructions executed by microcontrollers are in synchronization with clock signals. The timing for different operations in a microcontroller is assigned with the help of oscillators.
Detailed explanation-4: -In an oscillator circuit the crystal is mechanically vibrating on its resonance frequency fOSC, and provides a stable reference oscillation signal to the microcontroller and is used as input reference clock.