PIC16CE623 datasheet(91/114 Pages) MICROCHIP

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DS40182D-page 91

PIC16CE62X

13.5

Timing Diagrams and Specifications

FIGURE 13-5: EXTERNAL CLOCK TIMING

TABLE 13-3:

EXTERNAL CLOCK TIMING REQUIREMENTS

Parameter

No.

Sym

Characteristic

Min

Typ†

Max

Units Conditions

Fosc

External CLKIN Frequency

(Note 1)

—

MHz

XT and RC osc mode, VDD=5.0V

—

MHz

HS osc mode

—

200

kHz

LP osc mode

Oscillator Frequency

(Note 1)

—

MHz

RC osc mode, VDD=5.0V

0.1

—

MHz

XT osc mode

—

MHz

HS osc mode

–

200

kHz

LP osc mode

1Tosc

External CLKIN Period

(Note 1)

250

—

XT and RC osc mode

—

HS osc mode

5—

—

s

LP osc mode

Oscillator Period

(Note 1)

250

—

RC osc mode

250

—

10,000

XT osc mode

—

1,000

HS osc mode

5—

—

s

LP osc mode

2TCY

Instruction Cycle Time (Note 1)

200

—

TCY=FOSC/4

TosL,

TosH

External Clock in (OSC1) High or

Low Time

100*

—

XT oscillator, TOSC L/H duty cycle

—

s

LP oscillator, TOSC L/H duty cycle

20*

—

HS oscillator, TOSC L/H duty cycle

TosR,

TosF

External Clock in (OSC1) Rise or

Fall Time

25*

—

XT oscillator

50*

—

LP oscillator

15*

—

HS oscillator

These parameters are characterized but not tested.

†

Data in "Typ" column is at 5.0V, 25

C unless otherwise stated. These parameters are for design guidance only and are not

tested.

Note 1:

Instruction cycle period (TCY) equals four times the input oscillator time-base period. 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 con-

sumption. All devices are tested to operate at "min." values with an external clock applied to the OSC1 pin.

When an external clock input is used, the "Max." cycle time limit is "DC" (no clock) for all devices.

OSC1

CLKOUT

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