PIC12F683 datasheet(48/148 Pages) MICROCHIP

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PIC12F683

DS41211B-page 46

Preliminary

 2004 Microchip Technology Inc.

7.2

Timer2 Interrupt

The Timer2 module has an 8-bit period register, PR2.

Timer2 increments from 00h until it matches PR2 and

then resets to 00h on the next increment cycle. PR2 is

a readable and writable register. The PR2 register is

initialized to FFh upon Reset.

FIGURE 7-1:

TIMER2 BLOCK DIAGRAM

TABLE 7-1:

REGISTERS ASSOCIATED WITH TIMER2

Comparator

TMR2

Sets Flag

TMR2

Output

Reset

Postscaler

Prescaler

PR2

FOSC/4

1:1 to 1:16

1:1, 1:4, 1:16

bit TMR2IF

TOUTPS<3:0>

T2CKPS<1:0>

Addr

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR, BOD

Value on

all other

Resets

0Bh/

8Bh

INTCON

GIE

PEIE

T0IE

INTE

GPIE

T0IF

INTF

GPIF

0000 0000 0000 0000

0Ch

PIR1

EEIF

ADIF

CCP1IF

—

CMIF

OSFIF

TMR2IF

TMR1IF

000- 0000 000- 0000

11h

TMR2

Holding Register for the 8-bit TMR2 Register

0000 0000 0000 0000

12h

T2CON

—

TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 -000 0000

8Ch

PIE1

EEIE

ADIE

CCP1IE

—

CMIE

OSFIE

TMR2IE

TMR1IE 000- 0000 000- 0000

92h

PR2

Timer2 Module Period Register

1111 1111 1111 1111

Legend:

= unknown, u = unchanged, — = unimplemented, read as ‘0’. Shaded cells are not used by the Timer2 module.

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