pic24hj16gp304 Microchip Technology Inc., pic24hj16gp304 Datasheet - Page 119

• Manufacturer Part Number: pic24hj16gp304
• Description: High-performance, 16-bit Microcontrollers
• Manufacturer: Microchip Technology Inc.

10.0
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
• Interrupt on 16-bit Period register match or falling
FIGURE 10-1:
© 2007 Microchip Technology Inc.
Note:
modes
edge of external gate signal
TIMER1
This data sheet summarizes the features
of
PIC24HJ16GP304 devices. It is not
intended to be a comprehensive reference
source. To complement the information in
this data sheet, refer to the “PIC24H
Family Reference Manual”.
SOSCO/
PIC24HJ32GP202/204 and PIC24HJ16GP304
SOSCI
Set T1IF
T1CK
the
16-BIT TIMER1 MODULE BLOCK DIAGRAM
PIC24HJ32GP202/204
TGATE
0
1
Reset
Equal
SOSCEN
Comparator
TMR1
PR1
and
Preliminary
Q
Q
Gate
Sync
CK
T
CY
D
Figure 10-1 shows 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) 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
DS70289A-page 117