PIC24F08KA102-I Datasheet, PDF (115/278 Pages) Microchip Technology – 20/28-Pin General Purpose, 16-Bit Flash Microcontrollers with nanoWatt XLP Technology

PIC24F16KA102 FAMILY
12.0 TIMER1
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).
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 External Gate Signal
Figure 12-1 presents a block diagram of the 16-bit
Timer1 module.
To configure Timer1 for operation:
1. Set the TON bit (= 1).
2. Select the timer prescaler ratio using the
TCKPS<1:0> bits.
3. Set the Clock and Gating modes using the TCS
and TGATE bits.
4. Set or clear the TSYNC bit to configure
synchronous or asynchronous operation.
5. Load the timer period value into the PR1
register.
6. 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
SOSCO/
T1CK
SOSCI
TGATE
SOSCEN
Gate
Sync
TCY
TON
1x
01
TCKPS<1:0>
2
Prescaler
1, 8, 64, 256
00
TGATE
TCS
Set T1IF
1
0
Reset
QD
Q CK
TMR1
Equal
Comparator
0
1
TSYNC
Sync
PR1
 2008-2011 Microchip Technology Inc.
DS39927C-page 115