DEMO9S12XEP100 Freescale Semiconductor, DEMO9S12XEP100 Datasheet - Page 1240

• Manufacturer Part Number: DEMO9S12XEP100
• Description: BOARD DEMO FOR MC9S12XEP100
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of DEMO9S12XEP100

• Contents: Board, Cables, CD
• Processor To Be Evaluated: MC9S12XEP100
• Data Bus Width: 16 bit
• Interface Type: RS-232
• Silicon Manufacturer: Freescale
• Core Architecture: S12
• Core Sub-architecture: S12
• Silicon Core Number: MC9S12
• Silicon Family Name: S12XE
• Rohs Compliant: Yes
• For Use With/related Products: MC9S12XEP100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Appendix A Electrical Characteristics
A.6.3
Phase Locked Loop
A.6.3.1
Jitter Information
With each transition of the clock f
, the deviation from the reference clock f
is measured and input
cmp
ref
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
Figure
A-5.
1
2
3
N-1
N
0
t
min1
t
nom
t
max1
t
minN
t
maxN
Figure A-5. Jitter Definitions
The relative deviation of t
is at its maximum for one clock period, and decreases towards zero for larger
nom
number of clock periods (N).
MC9S12XE-Family Reference Manual , Rev. 1.23
1240
Freescale Semiconductor