PIC18LF23K22-ESLASHML datasheet(161/496 Pages) MICROCHIP

161 / 496 page

 2010 Microchip Technology Inc.

Preliminary

DS41412C-page 161

PIC18(L)F2X/4XK22

12.0 TIMER1/3/5 MODULE WITH

GATE CONTROL

The Timer1/3/5 module is a 16-bit timer/counter with

the following features:

• 16-bit timer/counter register pair (TMRxH:TMRxL)

• Programmable internal or external clock source

• 2-bit prescaler

• Dedicated Secondary 32 kHz oscillator circuit

• Optionally synchronized comparator out

• Multiple Timer1/3/5 gate (count enable) sources

• Interrupt on overflow

• Wake-up on overflow (external clock,

Asynchronous mode only)

• 16-Bit Read/Write Operation

• Time base for the Capture/Compare function

• Special Event Trigger (with CCP/ECCP)

• Selectable Gate Source Polarity

• Gate Toggle Mode

• Gate Single-pulse Mode

• Gate Value Status

• Gate Event Interrupt

Figure 12-1 is a block diagram of the Timer1/3/5

module.

FIGURE 12-1:

TIMER1/3/5 BLOCK DIAGRAM

TMRxH

TMRxL

TxSYNC

TxCKPS<1:0>

Prescaler

1, 2, 4, 8

Synchronized

clock input

Set flag bit

TMRxIF on

Overflow

TMRx(2),(4)

TMRxON

Note 1:

ST Buffer is high speed type when using TxCKI.

Timer1/3/5 register increments on rising edge.

Synchronize does not operate while in Sleep.

See Figure 12-2 for 16-Bit Read/Write Mode Block Diagram.

T1CKI is not available when the secondary oscillator is enabled. (SOSCGO = 1 or TXSOSCEN = 1)

T3CKI is not available when the secondary oscillator is enabled, unless T3CMX = 1.

Synchronized comparator output should not be used in conjunction with synchronized TxCKI.

TxG

FOSC/4

Internal

Clock

SOSCOUT

TxCKI

TMRxCS<1:0>

(5)

Synchronize(3),(7)

det

Sleep input

TMRxGE

TxGPOL

TxGVAL

TxGTM

Single Pulse

Acq. Control

TxGSPM

TxGGO/DONE

TxGSS<1:0>

FOSC

Internal

Clock

Reserved

TXGCON

Data Bus

det

Interrupt

TMRxGIF

Set

TxCLK

FOSC/2

Internal

Clock

TxG_IN

TMRxON

Timer2/4/6 Match

Comparator 1

PR2/4/6

Comparator 2

SYNCC2OUT(7)

SYNCC1OUT(7)

To Comparator Module

,(6)

TxSOSCEN

Secondary

Oscillator

Module

See Figure 2-4

TxCLK_EXT_SRC

(1)

PIC18LF23K22-E/ML Datasheet(PDF) 161 Page - Microchip Technology

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