MPC5646C datasheet(70/114 Pages) FREESCALE

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MPC5646C Microcontroller Data Sheet, Rev. 3

Preliminary—Subject to Change Without Notice

Freescale Semiconductor

4.14

FMPLL electrical characteristics

The device provides a frequency-modulated phase-locked loop (FMPLL) module to generate a fast system clock from the main

oscillator driver.

4.15

Fast internal RC oscillator (16 MHz) electrical characteristics

The device provides a 16 MHz main internal RC oscillator. This is used as the default clock at the power-up of the device and

can also be used as input to PLL.

Table 38. FMPLL electrical characteristics

Symbol

Parameter

Conditions1

1 V

DD = 3.3 V ± 10% / 5.0 V ± 10%, TA = 40 to 125 °C, unless otherwise specified.

Value2

2 All values need to be confirmed during device validation.

Unit

Min

Typ

Max

fPLLIN

SR — FMPLL reference clock3

3 PLLIN clock retrieved directly from 4-40 MHz XOSC or 16 MIRC. Input characteristics are granted when oscillator

is used in functional mode. When bypass mode is used, oscillator input clock should verify fPLLIN and PLLIN.

—4

—

MHz



PLLIN

SR — FMPLL reference clock duty

cycle(3)

—40

—

fPLLOUT CC P FMPLL output clock

frequency

—16

—

120

MHz

fCPU

SR — System clock frequency

—

120 + 2%4

4 f

CPU 120 + 2% MHz can be achieved at 125 °C.

MHz

fFREE

CC P Free-running frequency

—

150

MHz

tLOCK

CC P FMPLL lock time

Stable oscillator (fPLLIN = 16

MHz)

100

µs

t

LTJIT

CC — FMPLL long term jitter

fPLLIN = 40 MHz (resonator),

fPLLCLK @ 120 MHz, 4000

cycles

——

(for < 1ppm)

IPLL

CC C FMPLL consumption

TA = 25 °C

—

Table 39. Fast internal RC oscillator (16 MHz) electrical characteristics

Symbol

Parameter

Conditions1

Value2

Unit

Min

Typ

Max

fFIRC

CC P Fast internal RC oscillator high

frequency

TA = 25 °C, trimmed

—

MHz

SR —

—

IFIRCRUN

CC T Fast internal RC oscillator high

frequency current in running

mode

TA = 25 °C, trimmed

—

200

µA

IFIRCPWD CC D Fast internal RC oscillator high

frequency current in power

down mode

TA = 25 °C

—

100

DTA = 55 °C

—

200

DTA = 125 °C

—

µA

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