DSPIC33FJ64GS406 datasheet(417/456 Pages) MICROCHIP

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 2009-2012 Microchip Technology Inc.

DS70591E-page 417

dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610

28.2

AC Characteristics and Timing Parameters

This section defines the dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610 AC characteristics

and timing parameters for 50 MIPS devices.

TABLE 28-5:

EXTERNAL CLOCK TIMING REQUIREMENTS

AC CHARACTERISTICS

Standard Operating Conditions: 3.0V to 3.6V

(unless otherwise stated)

Operating temperature

-40°C

 TA  +85°C for Industrial

Param

No.

Symb

Characteristic

Min

Typ(1)

Max

Units

Conditions

MOS10 FIN

External CLKI Frequency

(External clocks allowed only

in EC and ECPLL modes)

—

MHz

Oscillator Crystal Frequency

3.5

—

MHz

kHz

MHz

SOSC

MOS20 TOSC

TOSC = 1/FOSC

—

MOS25 TCY

Instruction Cycle Time(2)

—

MOS30 TosL,

TosH

External Clock in (OSC1)

High or Low Time

0.375 x TOSC

—

0.625 x TOSC

MOS31 TosR,

TosF

External Clock in (OSC1)

Rise or Fall Time

——

MOS40 TckR

CLKO Rise Time(3)

—5.2

—

MOS41 TckF

CLKO Fall Time(3)

—5.2

—

MOS41 GM

External Oscillator

Transconductance

mA/V VDD = 3.3V,

TA = +25ºC

Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated.

2: Instruction cycle period (TCY) equals two 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/CLKI pin. When an external clock input is used, the

“max.” cycle time limit is “DC” (no clock) for all devices.

3: Measurements are taken in EC mode. The CLKO signal is measured on the OSC2 pin.

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