Digital Electronics - The 8051 Microcontroller - Discussion
Discussion Forum : The 8051 Microcontroller - General Questions (Q.No. 12)
12.
Device pins XTAL1 and XTAL2 for the 8051 are used for connections to an external oscillator or crystal.
Discussion:
8 comments Page 1 of 1.
Sharon said:
9 years ago
Why we need crystal oscilator in 8051 mc. What is the purpose?
Srikanth said:
1 decade ago
In 8051 crystal oscillator is connected to two capacitors of 33pf, here we can use capacitors which are having values different, what will happen?
Sabari said:
1 decade ago
19 & 20 pin for external osc pin.
Sri said:
1 decade ago
Microcontroller has internal clock circuit. It must be triggered with help of crystal or oscillator. Thus external crystal is used.
Rjkarthigeyan said:
1 decade ago
If the timer in 8051 is used as counter (C/T = 1) the clock pulse to the timer from the crystal oscillator is cut off.
So we need an external pulse from outside device in order to trigger on the counter, which will be done through the crystal pins.
So we need an external pulse from outside device in order to trigger on the counter, which will be done through the crystal pins.
Tejas said:
1 decade ago
If some1 wants to drive the connected peripheral device with some different clock speed then he may use these pins in order to have expected speed (clk) for his peripheral device...
Vikram said:
1 decade ago
Either oscillator or crystal can be connected to this pins but for accurate clock crystal is used.
Rahul kumar said:
1 decade ago
It is in pin configuration.
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