PIC18 TIMER

How many timers do we have in the PIC18F4520?

• 1

• 2

• 3

• 4

Timer0 can be used only as a 16-bit timer.

• True

• False

1. The T0CON register is a (n) _______-bit register.

• 8-bit

• 16-bit

• 32-bit

• 4-bit

11. Timer0 supports the highest prescaler value of _________.

• 126

• 256

• 255

• 64

1. In 16-bit mode, the counter rolls over when the counter goes from ______ to ________.

• FH to 0H

• FFH to 00H

• FFFH to 000H

• FFFFH to 0000H

1. Find the frequency and period used by timer if the crystal attached to the PIC18 has the following values:

a. XTAL=10 MHz

• 0.4us

• 0.04us

• 0.4ms

• 0.4ns

1. Find the frequency and period used by timer if the crystal attached to the PIC18 has the following values.

a. XTAL=10 MHz (prescaler 1:4)

• 1.6us

• 1.6ns

• 1.6ms

• 0.16us

When the timer used as a counter, it is a pulse outside the PIC18 that increments the TH, TL registers. State the PIC pin for counter.

• RA4

• RA3

• RB3

• RB4

What is the function of prescaler in PIC timer?

• Used when it is necessary to measure longer periods of time

• Used to make a short periods of time

• Used to create counter

• No answer

1-Hz external clock is being fed into pin T0CKI (RA4) and PORTB is connected to 8 LEDs as illustrate in Figure1. Which TIMER program will be used for the question ?

• Timer as a counter

• Timer as a time delay