PIC16C712 datasheet(81/106 Pages) MICROCHIP

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DS41106C-page 81

PIC16C712/716

12.4.3

TIMING DIAGRAMS AND SPECIFICATIONS

FIGURE 12-4:

EXTERNAL CLOCK TIMING

TABLE 12-2:

EXTERNAL CLOCK TIMING REQUIREMENTS

Param

No.

Sym.

Characteristic

Min.

Typ†

Max.

Units

Conditions

FOSC

External CLKIN Frequency

(Note 1)

—

MHz

RC and XT osc modes

—

MHz

HS osc mode (-04)

—

MHz

HS osc mode (-20)

—

200

kHz

LP osc mode

Oscillator Frequency

(Note 1)

—

MHz

RC osc mode

0.1

—

MHz

XT osc mode

—

MHz

HS osc mode

—

200

kHz

LP osc mode

1TOSC

External CLKIN Period

(Note 1)

250

—

RC and XT osc modes

250

—

HS osc mode (-04)

—

HS osc mode (-20)

5—

—

s

LP osc mode

Oscillator Period

(Note 1)

250

—

RC osc mode

250

—

10,000

XT osc mode

250

—

250

HS osc mode (-04)

—

250

HS osc mode (-20)

5—

—

s

LP osc mode

TCY

Instruction Cycle Time (Note 1)

200

—

TCY = 4/FOSC

TosL,

TosH

External Clock in (OSC1) High or

Low Time

100

—

XT oscillator

2.5

—

s

LP oscillator

—

HS oscillator

TosR,

TosF

External Clock in (OSC1) Rise or

Fall Time

—

XT oscillator

—

LP oscillator

—

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.

Note1: 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 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.

OSC1

CLKOUT

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