Microchip Technology Microstick for the 3V PIC24F K-series DM240013-1 DM240013-1 Data Sheet

 2011 Microchip Technology Inc.

DS31037B-page 123

The Timer4 module is implemented in
PIC24FXXKL30X/40X devices only. It has the following
features:
• Eight-bit Timer register (TMR4)
• Eight-bit Period register (PR4)
• Readable and writable (all registers)
• Software programmable prescaler (1:1, 1:4, 1:16)
• Software programmable postscaler (1:1 to 1:16)
• Interrupt on TMR4 match of PR4

The Timer4 module has a control register shown in

. Timer4 can be shut off by clearing

control bit, TMR4ON (T4CON<2>), to minimize power
consumption. The prescaler and postscaler selection of
Timer4 is controlled by this register. 
The prescaler and postscaler counters are cleared
when any of the following occurs: 
• A write to the TMR4 register
• A write to the T4CON register
• Any device Reset (POR, BOR, MCLR or WDT 

Reset)

TMR4 is not cleared when T4CON is written.

 is a simplified block diagram of the Timer4

module.

This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on
Timers, refer to the “PIC24F Family Refer-
ence Manual”

,  Section 14. “Timers”

(DS39704).

Comparator

TMR4 Output

Postscaler

Prescaler

2

F

OSC

/2

1:1 to 1:16

1:1, 1:4, 1:16

4

T4OUTPS<3:0>

T4CKPS<1:0>

Set T4IF

Internal Data Bus

8

Reset

TMR4/PR4

8

8

(to PWM)

Match