RFPIC12F675H Microchip Technology Inc., RFPIC12F675H Datasheet - Page 30

• Manufacturer Part Number: RFPIC12F675H
• Description: 20-pin Flash-based 8-bit Cmos Microcontroller With Uhf Ask/fsk Transmitter
• Manufacturer: Microchip Technology Inc.

rfPIC12F675
5.0
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
FIGURE 5-1:
DS70091A-page 28
TIMER1 MODULE WITH GATE
CONTROL
INTOSC
w/o CLKOUT
T1OSCEN
LP
OSC1
OSC2
TIMER1 BLOCK DIAGRAM
Set Flag bit
TMR1IF on
Overflow
LP Oscillator
TMR1H
TMR1
TMR1L
Preliminary
Clock
F
Internal
OSC
/4
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.
TMR1CS
1
0
Note:
T1CKPS<1:0>
T1SYNC
Additional information on timer modules is
available in the PICmicro
Reference Manual (DS33023).
Prescaler
1, 2, 4, 8
0
1
2
TMR1ON
TMR1GE
TMR1ON
TMR1GE
 2003 Microchip Technology Inc.
Synchronized
Clock Input
SLEEP Input
Synchronize
Detect
TM
T1G
Mid-Range