CF745 datasheet(126/217 Pages) MICROCHIP

126 / 217 page

PIC16C5X

PIC16CR57B

DS30453B-page 126

Preliminary

1TOSC

External CLKIN Period

(2)

250

—

XT osc mode

250

—

HS osc mode (04)

100

—

HS osc mode (10)

—

HS osc mode (20)

5.0

—

µs

LP osc mode

Oscillator Period

(2)

250

—

RC osc mode

250

—

10,000

XT osc mode

250

—

250

HS osc mode (04)

100

—

250

HS osc mode (10)

—

250

HS osc mode (20)

5.0

—

200

µs

LP osc mode

2TCY

Instruction Cycle Time

(3)

—

4/FOSC

——

TosL, TosH

Clock in (OSC1) Low or High Time

85*

—

XT oscillator

20*

—

HS oscillator

2.0*

—

µs

LP oscillator

TosR, TosF Clock in (OSC1) Rise or Fall Time

—

25*

XT oscillator

—

25*

HS oscillator

—

50*

LP oscillator

TABLE 15-2:

EXTERNAL CLOCK TIMING REQUIREMENTS - PIC16CR57B (CON’T)

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 15.1, Section 15.2 and Section 15.3.

Parameter

No.

Sym

Characteristic

Min

Typ

(1)

Max

Units

Conditions

These parameters are characterized but not tested.

Note 1:

Data in the Typical (“Typ”) column is at 5.0V, 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

conditions 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.

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