16F630 datasheet(98/132 Pages) MICROCHIP

98 / 132 page

PIC16F630/676

DS40039C-page 96

 2003 Microchip Technology Inc.

12.9

AC CHARACTERISTICS: PIC16F630/676 (INDUSTRIAL, EXTENDED)

FIGURE 12-5:

EXTERNAL CLOCK TIMING

TABLE 12-1:

EXTERNAL CLOCK TIMING REQUIREMENTS

Param

No.

Sym

Characteristic

Min

Typ†

Max

Units

Conditions

OSC

External CLKIN Frequency(1)

—

kHz

LP Osc mode

—

MHz XT mode

—

MHz HS mode

—

MHz EC mode

Oscillator Frequency(1)

—

kHz

LP Osc mode

—

MHz INTOSC mode

—

MHz RC Osc mode

0.1

—

MHz XT Osc mode

—

MHz HS Osc mode

OSC

External CLKIN Period(1)

—

∞µs

LP Osc mode

—

∞

HS Osc mode

—

∞

EC Osc mode

250

—

∞

XT Osc mode

Oscillator Period(1)

200

µs

LP Osc mode

—

250

—

INTOSC mode

250

—

RC Osc mode

250

—

10,000

XT Osc mode

—

1,000

HS Osc mode

Instruction Cycle Time(1)

200

CY = 4/FOSC

TosL,

TosH

External CLKIN (OSC1) High

External CLKIN Low

—

µs

LP oscillator, T

OSC L/H duty cycle

20*

—

HS oscillator, T

OSC L/H duty cycle

100 *

—

XT oscillator, T

OSC L/H duty cycle

4TosR,

TosF

External CLKIN Rise

External CLKIN Fall

—

50*

LP oscillator

—

25*

XT oscillator

—

15*

HS oscillator

These parameters are characterized but not tested.

† Data in ‘Typ’ column is at 5V, 25°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 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 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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