PIC18F44K20-I/SP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F44K20-I/SP

28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology

Microchip Technology 

PIC18F2XK20/4XK20

TABLE 26-6: EXTERNAL CLOCK TIMING REQUIREMENTS

Param.

No.

Symbol

Characteristic

Min

Max Units

Conditions

1A

1

2

3

4

Note 1:

FOSC

External CLKIN

Frequency(1)

DC

48

MHz EC, ECIO Oscillator mode,

(Extended Range Devices)

Oscillator Frequency(1)

DC

64

MHz EC, ECIO Oscillator mode,

(Industrial Range Devices)

DC

4

MHz RC Oscillator mode

0.1

4

MHz XT Oscillator mode

4

25

MHz HS Oscillator mode

4

16

MHz HS + PLL Oscillator mode,

(Industrial Range Devices)

4

12

MHz HS + PLL Oscillator mode,

(Extended Range Devices)

TOSC

External CLKIN Period(1)

5

20.8

200

kHz LP Oscillator mode

—

ns EC, ECIO, Oscillator mode

(Extended Range Devices)

Oscillator Period(1)

15.6

—

ns EC, ECIO, Oscillator mode,

(Industrial Range Devices)

250

—

ns RC Oscillator mode

250

10,000 ns XT Oscillator mode

40

250

ns HS Oscillator mode

62.5

250

ns HS + PLL Oscillator mode,

(Industrial range devices)

83.3

250

ns HS + PLL Oscillator mode,

(Extended Range Devices)

TCY

Instruction Cycle Time(1)

5

62.5

200

s LP Oscillator mode

—

ns TCY = 4/FOSC

TOSL, External Clock in (OSC1)

30

TOSH

High or Low Time

2.5

—

ns XT Oscillator mode

—

s LP Oscillator mode

10

—

ns HS Oscillator mode

TOSR, External Clock in (OSC1)

—

TOSF

Rise or Fall Time

—

20

ns XT Oscillator mode

50

ns LP Oscillator mode

—

7.5

ns HS Oscillator mode

Instruction cycle period (TCY) equals four times the input oscillator time base period for all configurations

except PLL. All specified values are based on characterization data for that particular oscillator type under

standard operating conditions with the device executing code. Exceeding these specified limits may result

in an unstable oscillator operation and/or higher than expected current consumption. All devices are tested

to operate at “min.” values with an external clock applied to the OSC1/CLKIN pin. When an external clock

input is used, the “max.” cycle time limit is “DC” (no clock) for all devices.

 2010 Microchip Technology Inc.

DS41303G-page 385

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