mpc5644a Freescale Semiconductor, Inc, mpc5644a Datasheet - Page 97

• Manufacturer Part Number: mpc5644a
• Description: Mpc5644a Microcontroller Data Sheet
• Manufacturer: Freescale Semiconductor, Inc

3.11
Freescale Semiconductor
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16
All internal registers retain data at 0 Hz.
“Loss of Reference Frequency” window is the reference frequency range outside of which the PLL is in self clocked
mode.
Self clocked mode frequency is the frequency that the PLL operates at when the reference frequency falls outside
the f
f
enhanced mode.
This value is determined by the crystal manufacturer and board design.
Jitter is the average deviation from the programmed frequency measured over the specified interval at maximum
f
signal. Noise injected into the PLL circuitry via V
increase the C
Proper PC board layout procedures must be followed to achieve specifications.
Values are with frequency modulation disabled. If frequency modulation is enabled, jitter is the sum of C
either f
This value is determined by the crystal manufacturer and board design. For 4 MHz to 40 MHz crystals specified for
this PLL, load capacitors should not exceed these limits.
Proper PC board layout procedures must be followed to achieve specifications.
This parameter is guaranteed by design rather than 100% tested.
V
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).
Modulation depth will be attenuated from depth setting when operating at modulation frequencies above 50 kHz.
VCO
SYS
IHEXT
Symbol
—
—
—
Temperature sensor electrical characteristics
. Measurements are made with the device powered by filtered supplies and clocked by a stable external clock
LOR
self clock range is 20–150 MHz. f
CS
cannot exceed V
window.
or f
CC
CC
CC
DS
JITTER
(depending on whether center spread or down spread modulation is enabled).
C
C Temperature
C Sensitivity
C Accuracy
monitoring range
percentage for a given interval.
Table 26. Temperature sensor electrical characteristics
RC33
Parameter
in external reference mode.
Preliminary—Subject to Change Without Notice
MPC5644A Microcontroller Data Sheet, Rev. 4
SCM
T
represents f
J
= –40 to 150 °C
DDPLL
Conditions
and V
SYS
after PLL output divider (ERFD) of 2 through 16 in
SSPLL
and variation in crystal oscillator frequency
min
–40
–10
—
typical
Value
6.3
—
—
Electrical characteristics
max
150
10
—
JITTER
mV/°C
Unit
°C
°C
and
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