PIC16C765SLASHSP datasheet(131/158 Pages) MICROCHIP

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DS41124A-page 131

PIC16C745/765

TABLE 16-2:

EXTERNAL CLOCK TIMING REQUIREMENTS

Param

No.

Sym

Characteristic

Min

Typ†

Max

Units

Conditions

FOSC

External CLKIN Frequency

(Note 1)

—

MHz

EC osc mode

—

MHz

E4 osc mode

Oscillator Frequency

(Note 1)

—

MHz

HS osc mode

—

MHz

H4 osc mode

1TOSC

External CLKIN Period

(Note 1)

—

EC osc modes

167

—

167

E4 osc mode

Oscillator Period

(Note 1)

—

HS osc modes

167

—

167

H4 osc mode

2TCY

Instruction Cycle Time (Note 1)

167

—

TCY = 4/FINT

TOSL,

TOSH

External Clock in (OSC1) High or Low

Time

TBD

—

EC oscillator

TOSR,

TOSF

External Clock in (OSC1) Rise or Fall

Time

TBD

—

EC 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 (TCY) equals four times the input oscillator time-base period when the PLL is enabled, or the input

oscillator time-base period divided by 4 when the PLL is disabled. 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.

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