PIC18F1220 View Datasheet(PDF) - Microchip Technology

Part Name

Description

MFG CO.

PIC18F1220

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

Microchip Technology 

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PIC18F1220/1320

FIGURE 11-1:

TIMER0 BLOCK DIAGRAM IN 8-BIT MODE

RA4/T0CKI

pin

FOSC/4

T0SE

0

1

1

Programmable

0

Prescaler

3

T0PS2, T0PS1, T0PS0

T0CS

PSA

Sync with

Internal

Clocks

(2 TCY Delay)

Data Bus

8

TMR0

Set Interrupt

Flag bit TMR0IF

on Overflow

Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI maximum prescale.

FIGURE 11-2:

TIMER0 BLOCK DIAGRAM IN 16-BIT MODE

RA4/T0CKI

pin

FOSC/4

T0SE

0

1

1

Programmable 0

Prescaler

3

T0PS2, T0PS1, T0PS0

T0CS

PSA

Sync with

Internal

Clocks

(2 TCY Delay)

TMR0L

8

TMR0

High Byte

8

Set Interrupt

Flag bit TMR0IF

on Overflow

8

TMR0H

Read TMR0L

Write TMR0L

8

Data Bus<7:0>

Note: Upon Reset, Timer0 is enabled in 8-bit mode with clock input from T0CKI maximum prescale.

DS39605F-page 100

© 2007 Microchip Technology Inc.

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