PIC18LF2431-I/ML View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF2431-I/ML

28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D

Microchip Technology 

PIC18F2331/2431/4331/4431

FIGURE 26-9:

TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS

T0CKI

T1OSO/T1CKI

40

41

42

TMR0 or TMR1

45

46

47

48

TABLE 26-9: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS

Param

No.

Symbol

Characteristic

Min

Max Units Conditions

40

Tt0H

T0CKI High Pulse Width

No prescaler

0.5 TCY + 20

—

ns VDD = 2V

With prescaler

10

—

ns

41

Tt0L

T0CKI Low Pulse Width

No prescaler

0.5 TCY + 20

—

ns

With prescaler

10

—

ns

42

Tt0P

T0CKI Period

No prescaler

TCY + 10

—

ns

With prescaler

Greater of:

—

20 ns or TCY + 40

N

ns N = prescale value

(1, 2, 4,..., 256)

45

Tt1H

T1CKI High Synchronous, no prescaler

Time

Synchronous, PIC18FXX31

with prescaler PIC18LFXX31

0.5 TCY + 20

10

25

—

ns

—

ns

—

ns

Asynchronous PIC18FXX31

30

—

ns

PIC18LFXX31

50

—

ns

46

Tt1L

T1CKI

Low Time

Synchronous, no prescaler

Synchronous,

with prescaler

PIC18FXX31

PIC18LFXX31

0.5 TCY + 5

10

25

—

ns

—

ns

—

ns

Asynchronous PIC18FXX31

30

—

ns

PIC18LFXX31

50

—

ns

47

Tt1P

T1CKI Input Synchronous

Period

Greater of:

—

20 ns or TCY + 40

N

ns N = prescale value

(1, 2, 4, 8)

Asynchronous

60

—

ns

Ft1

T1CKI Oscillator Input Frequency Range

DC

50 kHz

48

Tcke2tmrI Delay from External T1CKI Clock Edge to

Timer Increment

2 TOSC

7 TOSC —

 2010 Microchip Technology Inc.

DS39616D-page 351

Share Link: