PIC24F08KL402 datasheet(115/260 Pages) MICROCHIP

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 2011 Microchip Technology Inc.

DS31037B-page 115

PIC24F16KL402 FAMILY

12.0

TIMER1

The Timer1 module is a 16-bit timer which can operate

as a free-running, interval timer/counter, or serve as the

time counter for a software-based Real-Time Clock

(RTC). Timer1 is only reset on initial VDD power-on

events. This allows the timer to continue operating as an

RTC clock source through other types of device Reset.

Timer1 can operate in three modes:

•16-Bit Timer

• 16-Bit Synchronous Counter

• 16-Bit Asynchronous Counter

Timer1 also supports these features:

• Timer Gate Operation

• Selectable Prescaler Settings

• Timer Operation During CPU Idle and Sleep modes

• Interrupt on 16-Bit Period Register Match or

Falling Edge of External Gate Signal

Figure 12-1 illustrates a block diagram of the 16-bit

Timer1 module.

To configure Timer1 for operation:

Set the TON bit (= 1).

Select the timer prescaler ratio using the

TCKPS<1:0> bits.

Set the Clock and Gating modes using the TCS

and TGATE bits.

Set or clear the TSYNC bit to configure

synchronous or asynchronous operation.

Load the timer period value into the PR1

If interrupts are required, set the interrupt enable

bit, T1IE. Use the priority bits, T1IP<2:0>, to set

the interrupt priority.

FIGURE 12-1:

16-BIT TIMER1 MODULE BLOCK DIAGRAM

Note:

This data sheet summarizes the features

of this group of PIC24F devices. It is not

intended to be a comprehensive refer-

ence source. For more information on

Timers, refer to the “PIC24F Family Refer-

ence Manual”

, Section 14. “Timers”

(DS39704).

TON

Sync

SOSCI

SOSCO/

PR1

Set T1IF

Equal

Comparator

TMR1

Reset

SOSCEN

TSYNC

TCKPS<1:0>

Prescaler

1, 8, 64, 256

TGATE

TCY

T1CK

TCS

TGATE

Gate

Sync

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