PIC24FJ128GA008-I/PT【PDF 15/258 页】IC PIC MCU FLASH 128K 80TQFP

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Sheet目录3841

11页 12页 13页 14页 [15页]16页 17页 18页 19页

2005-2012 Microchip Technology Inc.

DS39747F-page 111

PIC24FJ128GA010 FAMILY

11.0

TIMER1

The Timer1 module is a 16-bit timer which can serve as

the time counter for the Real-Time Clock (RTC) or

operate as a free-running, interval timer/counter.

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 the external gate signal

Figure 11-1 presents a block diagram of the 16-bit timer

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 Timer1 Inter-

rupt Enable bit, T1IE. Use the priority bits,

T1IP<2:0>, to set the interrupt priority.

FIGURE 11-1:

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 reference

source. Refer to Section 14. “Timers”

(DS39704)

the

“PIC24F

Family

Reference Manual”

for more information.

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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