CF745 datasheet(178/217 Pages) MICROCHIP

178 / 217 page

PIC16C5X

DS30453B-page 178

Preliminary

19.6

Timing Diagrams and Speciﬁcations

FIGURE 19-2: EXTERNAL CLOCK TIMING - PIC16C5X, PIC16CR5X

TABLE 19-2:

EXTERNAL CLOCK TIMING REQUIREMENTS - PIC16C5X, PIC16CR5X

AC Characteristics

Standard Operating Conditions (unless otherwise speciﬁed)

Operating Temperature

°C ≤ TA ≤ +70°C (commercial)

–40

°C ≤ TA ≤ +85°C (industrial)

–40

°C ≤ TA ≤ +125°C (extended)

Operating Voltage VDD range is described in Section 19.1, Section 19.2 and Section 19.3.

Parameter

No.

Sym

Characteristic

Min

Typ

(1)

Max

Units

Conditions

FOSC

External CLKIN Frequency

(2)

—

4.0

MHz

XT osc mode

—

4.0

MHz

HS osc mode (04)

—

MHz

HS osc mode (20)

—

200

kHz

LP osc mode

Oscillator Frequency

(2)

—

4.0

MHz

RC osc mode

0.455

—

4.0

MHz

XT osc mode

—

4.0

MHz

HS osc mode (04)

—

MHz

HS osc mode (20)

—

200

kHz

LP osc mode

1TOSC

External CLKIN Period

(2)

250

—

XT osc mode

250

—

HS osc mode (04)

—

HS osc mode (20)

5.0

—

µs

LP osc mode

Oscillator Period

(2)

250

—

RC osc mode

250

—

2,200

XT osc mode

250

—

250

HS osc mode (04)

—

250

HS osc mode (20)

5.0

—

200

µs

LP osc mode

These parameters are characterized but not tested.

Note 1:

Data in the Typical (“Typ”) column is at 5V, 25

°C unless otherwise stated. These parameters are for design guidance only

and are not tested.

All speciﬁed values are based on characterization data for that particular oscillator type under standard operating condi-

tions with the device executing code. Exceeding these speciﬁed limits may result in an unstable oscillator operation and/or

higher than expected current consumption.

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

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

OSC1

CLKOUT

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