Microchip Technology MA240029 データシート
2010-2011 Microchip Technology Inc.
DS39996F-page 197
PIC24FJ128GA310 FAMILY
12.0
TIMER1
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
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
presents a block diagram of the 16-bit
timer module.
To configure Timer1 for operation:
1.
To configure Timer1 for operation:
1.
Set the TON bit (= 1).
2.
Select the timer prescaler ratio using the
TCKPS<1:0> bits.
TCKPS<1:0> bits.
3.
Set the Clock and Gating modes using the TCS,
TECS and TGATE bits.
TECS and TGATE bits.
4.
Set or clear the TSYNC bit to configure
synchronous or asynchronous operation.
synchronous or asynchronous operation.
5.
Load the timer period value into the PR1
register.
register.
6.
If interrupts are required, set the interrupt enable
bit, T1IE. Use the priority bits, T1IP<2:0>, to set
the interrupt priority.
bit, T1IE. Use the priority bits, T1IP<2:0>, to set
the interrupt priority.
FIGURE 12-1:
16-BIT TIMER1 MODULE BLOCK DIAGRAM
Note:
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 Family Reference Manual”,
Section 14. “Timers”
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 14. “Timers”
(DS39704). The
information in this data sheet supersedes
the information in the FRM.
the information in the FRM.
TON
Sync
SOSCI
SOSCO
PR1
Set T1IF
Equal
Comparator
TMR1
Reset
SOSCEN
1
0
TSYNC
Q
Q
D
CK
TCKPS<1:0>
2
TGATE
T
CY
1
0
TCS
TGATE
Gate
Sync
SOSC
Input
Gate
Output
Clock
Output
to TMR1
Clock Input Select Detail
LPRC Input
2
T1ECS<1:0>
T1CK Input
SOSCSEL<1:0>
LPRC
Clock
Input Select
Prescaler
1, 8, 64, 256