PIC16F1938_13 Datasheet, PDF (201/488 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver

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 refer-
ences 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 MSSP
module (Timer2 only)
See Figure 22-1 for a block diagram of Timer2/4/6.
FIGURE 22-1:
TIMER2/4/6 BLOCK DIAGRAM
PIC16(L)F1938/9
FOSC/4
Prescaler
1:1, 1:4, 1:16, 1:64
2
TxCKPS<1:0>
TMRx
Reset
TMRx Output
Comparator
Postscaler
EQ ^{1:1 to 1:16}
PRx
4
TxOUTPS<3:0>
Sets Flag bit TMRxIF
 2011-2013 Microchip Technology Inc.
DS40001574C-page 201