DSPIC33FJ64GP306 Microchip Technology Inc., DSPIC33FJ64GP306 Datasheet - Page 149

• Manufacturer Part Number: DSPIC33FJ64GP306
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

11.0
The Timer1 module is a 16-bit timer, which can serve
as the time counter for the real-time clock, 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
FIGURE 11-1:
© 2007 Microchip Technology Inc.
Note:
modes
TIMER1
This data sheet summarizes the features
of this group of dsPIC33FJXXXGPX06/
X08/X10 devices. It is not intended to be a
comprehensive reference source.
complement the information in this data
sheet, refer to the “dsPIC33F Family
Reference Manual” . Please refer to the
Microchip web site (www.microchip.com)
for the latest dsPIC33F Family Reference
Manual sections.
SOSCO/
SOSCI
Set T1IF
T1CK
16-BIT TIMER1 MODULE BLOCK DIAGRAM
TGATE
0
1
Reset
Equal
dsPIC33FJXXXGPX06/X08/X10
SOSCEN
Comparator
TMR1
PR1
To
Q
Q
Gate
Sync
CK
T
CY
D
• Interrupt on 16-bit Period register match or falling
Figure 11-1 presents a block diagram of the 16-bit timer
module.
To configure Timer1 for operation:
1.
2.
3.
4.
5.
6.
edge of external gate signal
Set the TON bit (= 1) in the T1CON register.
Select the timer prescaler ratio using the
TCKPS<1:0> bits in the T1CON register.
Set the Clock and Gating modes using the TCS
and TGATE bits in the T1CON register.
Set or clear the TSYNC bit in T1CON to select
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, T1IP<2:0>, to set
the interrupt priority.
TSYNC
1x
01
00
0
1
TON
TGATE
TCS
Sync
TCKPS<1:0>
1, 8, 64, 256
Prescaler
2
DS70286A-page 147