What is prescaler in AVR?
What is prescaler in AVR?
The clock unit of the AVR timers consists of a prescaler connected to a multiplexer. A prescaler can be considered as a clock divider. Generally, it is implemented as a counter with several output signals at different counting stages.
What’s the maximum delay can you create with TIMER0 using 16 MHz Xtal?
16.384 ms
Methodology – Using Interrupts So now, we have to flash the LED every 50 ms. With CPU frequency 16 MHz, even a maximum delay of 16.384 ms can be achieved using a 1024 prescaler.
What is the range of TIMER0 outputs in 16-bit mode?
Using Timer0 Interrupt Every time an overflow occurs at (FF to 00 in 8-bit mode and FFFF to 0000 in 16-bit mode).
What is the maximum value of TIMER1 in Atmega 8535?
65535
Since TIMER1 is a 16-bit timer, it can count upto a maximum of 65535.
What is clock prescaler?
A prescaler is an electronic counting circuit used to reduce a high frequency electrical signal to a lower frequency by integer division. The purpose of the prescaler is to allow the timer to be clocked at the rate a user desires.
What is the maximum delay that can be generated with the crystal frequency of 40mhz?
Discussion Forum
| Que. | What is the maximum delay that can be generated with the crystal frequency of 22MHz? |
|---|---|
| b. | 0.011 msec |
| c. | 11.63 sec |
| d. | 2.97 msec |
| Answer:2.97 msec |
What is the longest delay that can be generated by programming Timer1 in Mode1?
Timer Mode1 The timer in Mode-1 can be used as a 16-bit timer to count from 0000 to FFFFH thus allowing to generate a wide range of delay.
Is a Timer0 prescaler select bit?
The Timer0 module incorporates the following features: Software selectable operation as a timer or counter in both 8-bit or 16-bit modes. Dedicated 8-bit, software programmable prescaler. Selectable clock source (internal or external)
What is the use of prescaler in Timer0?
The purpose of the prescaler is to allow the timer to be clocked at the rate a user desires. For shorter (8 and 16-bit) timers, there will often be a tradeoff between resolution (high resolution requires a high clock rate) and range (high clock rates cause the timer to overflow more quickly).
Which of the following pin used as the input clock for the TIMER0 in ATmega8?
ATMEGA8 Pin Configuration
| Pin No. | Pin name | Alternate Function |
|---|---|---|
| 5 | PD3 (INT1) | External Interrupt INT1 |
| 6 | PD4 (XCK/T0) | T0( Timer0 External Counter Input) XCK ( USART External Clock I/O) |
| 7 | VCC | |
| 8 | GND |
What does a prescaler do?
A prescaler is an electronic counting circuit used to reduce a high frequency electrical signal to a lower frequency by integer division.
