PIC16F1847_13 Datasheet, PDF (189/440 Pages) Microchip Technology – 18/20/28-Pin Flash Microcontrollers with XLP Technology

22.0 TIMER2/4/6 MODULES
There are up to three identical Timer2-type modules
available. To maintain pre-existing naming conventions,
the Timers are called Timer2, Timer4 and Timer6 (also
Timer2/4/6).
Note:
The ‘x’ variable used in this section is
used to designate Timer2, Timer4, or
Timer6. For example, TxCON references
T2CON, T4CON or T6CON. PRx
references PR2, PR4 or PR6.
The Timer2/4/6 modules incorporate the following
features:
• 8-bit Timer and Period registers (TMRx and PRx,
respectively)
• Readable and writable (both registers)
• Software programmable prescaler (1:1, 1:4, 1:16,
and 1:64)
• Software programmable postscaler (1:1 to 1:16)
• Interrupt on TMRx match with PRx, respectively
• Optional use as the shift clock for the MSSPx
modules (Timer2 only)
See Figure 22-1 for a block diagram of Timer2/4/6.
FIGURE 22-1:
TIMER2/4/6 BLOCK DIAGRAM
PIC16(L)F1847
TMRx
Output
Sets Flag
bit TMRxIF
FOSC/4
Prescaler
1:1, 1:4, 1:16, 1:64
2
TxCKPS<1:0>
TMRx
Reset
Comparator
Postscaler
EQ ^{1:1 to 1:16}
PRx
4
TxOUTPS<3:0>
 2011-2013 Microchip Technology Inc.
Preliminary
DS40001453D-page 189