PIC24FJ128GB MICROCHIP [Microchip Technology], PIC24FJ128GB Datasheet - Page 149

• Manufacturer Part Number: PIC24FJ128GB
• Description: 64/80/100-Pin, 16-Bit Flash Microcontrollers with USB On-The-Go (OTG)
• Manufacturer: MICROCHIP [Microchip Technology]

10.0
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
• Interrupt on 16-Bit Period Register Match or
FIGURE 10-1:
© 2008 Microchip Technology Inc.
Note:
modes
Falling Edge of External Gate Signal
TIMER1
SOSCO/
This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F
”Section 14. Timers” (DS39704).
SOSCI
T1CK
Set T1IF
Family
16-BIT TIMER1 MODULE BLOCK DIAGRAM
TGATE
1
0
Reference
Reset
Equal
SOSCEN
Comparator
Manual”,
TMR1
PR1
PIC24FJ256GB110 FAMILY
Preliminary
Q
Q
Gate
Sync
CK
T
CY
D
Figure 10-1 presents a block diagram of the 16-bit
timer module.
To configure Timer1 for operation:
1.
2.
3.
4.
5.
6.
Set the TON bit (= 1).
Select the timer prescaler ratio using the
TCKPS1:TCKPS0 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
register.
If interrupts are required, set the interrupt enable
bit, T1IE. Use the priority bits, T1IP2:T1IP0, to
set the interrupt priority.
TSYNC
1x
01
00
0
1
TON
TGATE
TCS
Sync
TCKPS1:TCKPS0
1, 8, 64, 256
Prescaler
2
DS39897B-page 147