LFDAS12XSFT Freescale Semiconductor, LFDAS12XSFT Datasheet - Page 691

• Manufacturer Part Number: LFDAS12XSFT
• Description: HARDWARE MC9S12XS 80-PIN
• Manufacturer: Freescale Semiconductor

Specifications of LFDAS12XSFT

• Module/board Type: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: -

A.6.3
A.6.3.1
With each transition of the clock f
voltage to the VCO is adjusted accordingly.The adjustment is done continuously with no abrupt changes
in the clock output frequency. Noise, voltage, temperature and other factors cause slight variations in the
control loop resulting in a clock jitter. This jitter affects the real minimum and maximum clock periods as
illustrated in
The relative deviation of t
number of clock periods (N).
Defining the jitter as:
Freescale Semiconductor
0
Phase Locked Loop
Figure
Jitter Information
t
min1
t
nom
t
max1
A-4.
nom
1
is at its maximum for one clock period, and decreases towards zero for larger
J N
( )
S12XS Family Reference Manual, Rev. 1.11
cmp
, the deviation from the reference clock f
=
Figure A-4. Jitter Definitions
max 1
2
⎛
⎜
⎝
–
t
---------------------- -
N t
max
t
minN
t
⋅
maxN
nom
( )
N
3
,
1
–
---------------------- -
N t
t
min
⋅
nom
( )
N
⎞
⎟
⎠
N-1
ref
is measured and input
Electrical Characteristics
N
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