PIC18F6X2X datasheet(147/386 Pages) MICROCHIP

147 / 386 page

 2003 Microchip Technology Inc.

Advance Information

DS39612A-page 145

PIC18F6X2X/8X2X

14.0

TIMER3 MODULE

The Timer3 module timer/counter has the following

features:

• 16-bit timer/counter

(two 8-bit registers: TMR3H and TMR3L)

• Readable and writable (both registers)

• Internal or external clock select

• Interrupt-on-overflow from FFFFh to 0000h

• RESET from CCP module trigger

Figure 14-1 is a simplified block diagram of the Timer3

module.

module and sets the CCP clock source.

module, as well as contains the Timer1 oscillator

enable bit (T1OSCEN) which can be a clock source for

Timer3.

T3CON: TIMER3 CONTROL REGISTER

R/W-0

RD16

T3CCP2

T3CKPS1

T3CKPS0

T3CCP1

T3SYNC

TMR3CS

TMR3ON

bit 7

bit 0

bit 7

RD16: 16-bit Read/Write Mode Enable bit

= Enables register read/write of Timer3 in one 16-bit operation

= Enables register read/write of Timer3 in two 8-bit operations

bit 6,3

T3CCP2:T3CCP1: Timer3 and Timer1 to CCPx Enable bits

= Timer3 and Timer4 are the clock sources for CCP1 through CCP5

= Timer3 and Timer4 are the clock sources for CCP3 through CCP5;

Timer1 and Timer2 are the clock sources for CCP1 and CCP2

= Timer3 and Timer4 are the clock sources for CCP2 through CCP5;

Timer1 and Timer2 are the clock sources for CCP1

= Timer1 and Timer2 are the clock sources for CCP1 through CCP5

bit 5-4

T3CKPS1:T3CKPS0: Timer3 Input Clock Prescale Select bits

= 1:8 prescale value

= 1:4 prescale value

= 1:2 prescale value

= 1:1 prescale value

bit 2

T3SYNC: Timer3 External Clock Input Synchronization Control bit

(Not usable if the system clock comes from Timer1/Timer3.)

When TMR3CS = 1:

= Do not synchronize external clock input

= Synchronize external clock input

When TMR3CS = 0:

This bit is ignored. Timer3 uses the internal clock when TMR3CS = 0.

bit 1

TMR3CS: Timer3 Clock Source Select bit

= External clock input from Timer1 oscillator or T13CKI

(on the rising edge after the first falling edge)

= Internal clock (FOSC/4)

bit 0

TMR3ON: Timer3 On bit

= Enables Timer3

= Stops Timer3

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

- n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

PIC18F6X2X Datasheet(PDF) 147 Page - Microchip Technology

PIC18F6X2X Datasheet(HTML) 147 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL