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| RFPIC12F675 Datasheet, PDF (28/136 Pages) Microchip Technology – FLASH-Based Microcontroller with ASK/FSK Transmitter | |||
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rfPIC12F675
5.0 TIMER1 MODULE WITH GATE
CONTROL
The rfPIC12F675 devices have a 16-bit timer. Figure 5-1
shows the basic block diagram of the Timer1 module.
Timer1 has the following features:
⢠16-bit timer/counter (TMR1H:TMR1L)
⢠Readable and writable
⢠Internal or external clock selection
⢠Synchronous or asynchronous operation
⢠Interrupt on overflow from FFFFh to 0000h
⢠Wake-up upon overflow (Asynchronous mode)
⢠Optional external enable input (T1G)
⢠Optional LP oscillator
The Timer1 Control register (T1CON), shown in
Register 5-1, is used to enable/disable Timer1 and
select the various features of the Timer1 module.
Note:
Additional information on timer modules is
available in the PICmicroTM Mid-Range
Reference Manual (DS33023).
FIGURE 5-1:
TIMER1 BLOCK DIAGRAM
TMR1ON
TMR1GE
Set Flag bit
TMR1IF on
Overflow
TMR1
TMR1H
TMR1L
OSC1
LP Oscillator
OSC2
INTOSC
w/o CLKOUT
T1OSCEN
TMR1ON
T1G
TMR1GE
0
1
FOSC/4
Internal
Clock
1
0
TMR1CS
T1SYNC
Prescaler
1, 2, 4, 8
2
T1CKPS<1:0>
Synchronized
Clock Input
Synchronize
Detect
SLEEP Input
LP
DS70091B-page 28
Preliminary
ï£ 2003-2013 Microchip Technology Inc.
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