PIC32MX795F512LT-80ISLASHPF datasheet(196/256 Pages) MICROCHIP

196 / 256 page

PIC32MX5XX/6XX/7XX

DS61156G-page 196

TABLE 31-18: PLL CLOCK TIMING SPECIFICATIONS (VDD = 2.3V TO 3.6V)

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V

(unless otherwise stated)

Operating temperature

-40°C

≤TA ≤+85°C for Industrial

-40°C

≤TA ≤+105°C for V-Temp

Param.

No.

Symbol

Characteristics(1)

Min.

Typical

Max.

Units

Conditions

OS50

FPLLI

PLL Voltage Controlled

Oscillator (VCO) Input

Frequency Range

—

MHz ECPLL, HSPLL, XTPLL,

FRCPLL modes

OS51

FSYS

On-Chip VCO System

Frequency

—

120

MHz

—

OS52

TLOCK

PLL Start-up Time (Lock Time)

—

OS53

DCLK

CLKO Stability(2)

(Period Jitter or Cumulative)

-0.25

—

+0.25

Measured over 100 ms

period

Note 1:

These parameters are characterized, but not tested in manufacturing.

This jitter specification is based on clock-cycle by clock-cycle measurements. To get the effective jitter for

individual time-bases on communication clocks, use the following formula:

For example, if SYSCLK = 80 MHz and SPI bit rate = 20 MHz, the effective jitter is as follows:

EffectiveJitter

DCLK

SYSCLK

CommunicationClock

----------------------------------------------------------

--------------------------------------------------------------

EffectiveJitter

DCLK

------

--------------

DCLK

--------------

TABLE 31-19: INTERNAL FRC ACCURACY

AC CHARACTERISTICS

Standard Operating Conditions: 2.3V to 3.6V

(unless otherwise stated)

Operating temperature

-40°C

≤TA ≤+85°C for Industrial

-40°C

≤TA ≤+105°C for V-Temp

Param.

No.

Characteristics

Min.

Typical

Max.

Units

Conditions

Internal FRC Accuracy @ 8.00 MHz(1) for PIC32MX575/675/695/775 Family Devices

F20a

FRC

-2

—

Internal FRC Accuracy @ 8.00 MHz(1,2) for PIC32MX534/564/664/764 Family Devices

F20b

FRC

-0.9

—

+0.9

—

Note 1:

Frequency calibrated at 25°C and 3.3V. The TUN bits can be used to compensate for temperature drift.

This information is preliminary.

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