PIC17C752-08SLASHCL datasheet(95/328 Pages) MICROCHIP

95 / 328 page

DS30289A-page 95

PIC17C7XX

12.0

TIMER0

The Timer0 module consists of a 16-bit timer/counter,

TMR0. The high byte is register TMR0H and the low

byte is register TMR0L. A software programmable 8-bit

prescaler makes Timer0 an effective 24-bit overﬂow

timer. The clock source is software programmable as

either the internal instruction clock or an external clock

on the RA1/T0CKI pin. The control bits for this module

are in register T0STA (Figure 12-1).

FIGURE 12-1: T0STA REGISTER

(ADDRESS: 05h, UNBANKED)

R/W - 0

U - 0

INTEDG

T0SE

T0CS

T0PS3

T0PS2

T0PS1

T0PS0

—

R = Readable bit

W = Writable bit

U = Unimplemented,

Read as '0'

-n = Value at POR reset

bit7

bit0

bit 7:

INTEDG: RA0/INT Pin Interrupt Edge Select bit

This bit selects the edge upon which the interrupt is detected

1 = Rising edge of RA0/INT pin generates interrupt

0 = Falling edge of RA0/INT pin generates interrupt

bit 6:

T0SE: Timer0 Clock Input Edge Select bit

This bit selects the edge upon which TMR0 will increment

When T0CS = 0 (External Clock)

1 = Rising edge of RA1/T0CKI pin increments TMR0 and/or sets the T0CKIF bit

0 = Falling edge of RA1/T0CKI pin increments TMR0 and/or sets the T0CKIF bit

When T0CS = 1 (Internal Clock)

Don’t care

bit 5:

T0CS: Timer0 Clock Source Select bit

This bit selects the clock source for TMR0.

1 = Internal instruction clock cycle (TCY)

0 = External Clock input on the T0CKI pin

bit 4-1:

T0PS3:T0PS0: Timer0 Prescale Selection bits

These bits select the prescale value for TMR0.

bit 0:

Unimplemented: Read as '0'

T0PS3:T0PS0

Prescale Value

0000

0001

0010

0011

0100

0101

0110

0111

1xxx

1:1

1:2

1:4

1:8

1:16

1:32

1:64

1:128

1:256

PIC17C752-08/CL Datasheet(PDF) 95 Page - Microchip Technology

PIC17C752-08/CL Datasheet(HTML) 95 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL