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PIC16CE62X

13.4

Timing Diagrams and Speci铿乧ations

FIGURE 13-2: EXTERNAL CLOCK TIMING

Q4

OSC1

1

2

CLKOUT

3

4

Q1

Q2

Q3

Q4

Q1

TABLE 13-4:

Parameter

No.

EXTERNAL CLOCK TIMING REQUIREMENTS

Characteristic

External CLKIN Frequency

(Note 1)

Oscillator Frequency

(Note 1)

Min

DC

0.1

1

DC

250

50

5

250

50

5

1.0

100*

2*

20*

Typ鈥?/div>

鈥?/div>

Fosc/4

鈥?/div>

Max

4

20

200

4

20

200

鈥?/div>

10,000

1,000

鈥?/div>

DC

鈥?/div>

Units Conditions

MHz

kHz

MHz

kHz

ns

碌s

ns

碌s

ns

碌s

ns

XT and RC osc mode, V

DD

=5.0V

HS osc mode

LP osc mode

RC osc mode, V

DD

=5.0V

XT osc mode

HS osc mode

LP osc mode

XT and RC osc mode

HS osc mode

LP osc mode

RC osc mode

XT osc mode

HS osc mode

LP osc mode

Sym

Fos

1

Tosc

External CLKIN Period

(Note 1)

Oscillator Period

(Note 1)

2

3*

T

CY

TosL,

TosH

Instruction Cycle Time (Note 1)

External Clock in (OSC1) High or

Low Time

T

CYS

=F

OSC

/4

XT oscillator, T

OSC

L/H duty cycle

LP oscillator, T

OSC

L/H duty cycle

HS oscillator, T

OSC

L/H duty

cycle

XT oscillator

LP oscillator

HS oscillator

4*

TosR,

TosF

External Clock in (OSC1) Rise or

Fall Time

25*

50*

15*

These parameters are characterized but not tested.

Data in "Typ" column is at 5.0V, 25掳C unless otherwise stated. These parameters are for design guidance

only and are not tested.

Note 1: Instruction cycle period (T

CY

) equals four times the input oscillator time-base period. All speci铿乪d values are

based on characterization data for that particular oscillator type under standard operating conditions with the

device executing code. Exceeding these speci铿乪d 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 exter-

nal 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.

*

鈥?/div>

DS40182A-page 88

Preliminary

漏

1998 Microchip Technology Inc.

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