dspic33fj128gp706at-i-pt Microchip Technology Inc., dspic33fj128gp706at-i-pt Datasheet - Page 165

• Manufacturer Part Number: dspic33fj128gp706at-i-pt
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

12.0
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
FIGURE 12-1:
© 2009 Microchip Technology Inc.
Note:
TIMER1
This data sheet summarizes the features
of the dsPIC33FJXXXGPX06A/X08A/X10A
family of devices. However, it is not
intended to be a comprehensive reference
source. To complement the information in
this data sheet, refer to Section 11.
“Timers” (DS70205) in the “dsPIC33F
Family Reference Manual”, which is
available from the Microchip web site
(www.microchip.com).
SOSCO/
SOSCI
Set T1IF
T1CK
16-BIT TIMER1 MODULE BLOCK DIAGRAM
dsPIC33FJXXXGPX06A/X08A/X10A
TGATE
0
1
Reset
Equal
SOSCEN
Comparator
TMR1
PR1
Preliminary
Q
Q
Gate
Sync
CK
T
CY
D
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 falling
Figure 12-1 presents a block diagram of the 16-bit
timer module.
To configure Timer1 for operation:
1.
2.
3.
4.
5.
6.
modes
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
DS70593A-page 163