PIC18LF1320-I/PSQTP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF1320-I/PSQTP

18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

Microchip Technology 

PIC18F1220/1320

13.2 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 13-1:

TIMER2 BLOCK DIAGRAM

13.3 Output of TMR2

The output of TMR2 (before the postscaler) is fed to the

Synchronous Serial Port module, which optionally uses

it to generate the shift clock.

TMR2

Output(1)

Sets Flag

bit TMR2IF

FOSC/4

Prescaler

1:1, 1:4, 1:16

2

T2CKPS1:T2CKPS0

TMR2

Reset

Comparator

Postscaler

EQ 1:1 to 1:16

PR2

4

TOUTPS3:TOUTPS0

TABLE 13-1: REGISTERS ASSOCIATED WITH TIMER2 AS A TIMER/COUNTER

Name Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR, BOR

Value on

all other

Resets

INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE

RBIE TMR0IF INT0IF

RBIF 0000 000x 0000 000u

PIR1

—

ADIF

RCIF

TXIF

—

CCP1IF TMR2IF TMR1IF -000 -000 -000 -000

PIE1

—

ADIE

RCIE

TXIE

—

CCP1IE TMR2IE TMR1IE -000 -000 -000 -000

IPR1

—

ADIP

RCIP

TXIP

—

CCP1IP TMR2IP TMR1IP -111 -111 -111 -111

TMR2 Timer2 Module Register

0000 0000 0000 0000

T2CON

—

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

PR2 Timer2 Period Register

1111 1111 1111 1111

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

DS39605F-page 110

© 2007 Microchip Technology Inc.

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