MPC5604PEFMLL datasheet(50/84 Pages) FREESCALE

50 / 84 page

MPC5604P Microcontroller Data Sheet, Rev. 5

Preliminary—Subject to Change Without Notice

Freescale Semiconductor

3.12

16 MHz RC oscillator electrical characteristics

5 f

VCO self clock range is 20-150 MHz. fSCM represents fSYS after PLL output divider (ERFD) of 2 through 16 in

enhanced mode.

6 This value is determined by the crystal manufacturer and board design.

7 Jitter is the average deviation from the programmed frequency measured over the specified interval at maximum

fSYS. Measurements are made with the device powered by filtered supplies and clocked by a stable external clock

signal. Noise injected into the PLL circuitry via VDDPLL and VSSPLL and variation in crystal oscillator frequency

increase the CJITTER percentage for a given interval.

8 Proper PC board layout procedures must be followed to achieve specifications.

9 Values are with frequency modulation disabled. If frequency modulation is enabled, jitter is the sum of C

JITTER and

either fCS or fDS (depending on whether center spread or down spread modulation is enabled).

10 Short term jitter is measured on the clock rising edge at cycle n and cycle n+4.

11 This value is determined by the crystal manufacturer and board design. For 4 MHz to 20 MHz crystals specified for

this PLL, load capacitors should not exceed these limits.

12 This specification applies to the period required for the PLL to relock after changing the MFD frequency control bits

in the synthesizer control register (SYNCR).

13 This value is true when operating at frequencies above 60 MHz, otherwise f

CS is 2% (above 64 MHz).

14 Modulation depth will be attenuated from depth setting when operating at modulation frequencies above 50kHz.

Table 28. 16 MHz RC oscillator electrical characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fRC

RC oscillator frequency

TA = 25 °C

—

MHz

RCMVAR

Fast internal RC oscillator variation

over temperature and

supply with respect to fRC at TA = 25 °C

in high-frequency configuration

—-5

—

RCMTRIM

Post Trim Accuracy: The variation of the

PTF1 from the 16 MHz

1 PTF = Post Trimming Frequency: The frequency of the output clock after trimming at typical supply voltage and

temperature

TA = 25 °C

-1

—

RCMSTEP

Fast internal RC oscillator trimming

step

TA = 25 °C

—

1.6

—

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