PIC18F1XK22 Datasheet, PDF (111/388 Pages) Microchip Technology – 20-Pin Flash Microcontrollers with nanoWatt XLP Technology

PIC18F1XK22/LF1XK22
FIGURE 12-2:
TIMER3 BLOCK DIAGRAM (16-BIT READ/WRITE MODE)
Timer1 Oscillator
Timer1 Clock Input
1
OSC1/T1OSI
OSC2
INTOSC
Without CLKOUT
T1OSCEN⁽¹⁾
1
FOSC/4
Internal
Clock
0
TMR3CS
Prescaler
1, 2, 4, 8
2
Synchronize
Detect
0
Sleep Input
T3CKPS<1:0>
T3SYNC
TMR3ON
Timer3
On/Off
CCP1 Special Event Trigger
CCP1 Select from T3CON<3>
Clear TMR3
TMR3L
TMR3
High Byte
8
Set
TMR3IF
on Overflow
Read TMR1L
8
8
Write TMR1L
TMR3H
8
8
Internal Data Bus
Note 1: When enable bit, T1OSCEN, is cleared, the inverter and feedback resistor are turned off to eliminate power drain.
 2010 Microchip Technology Inc.
Preliminary
DS41365D-page 111