MC9S12DG128CFUE Freescale, MC9S12DG128CFUE Datasheet - Page 123

• Manufacturer Part Number: MC9S12DG128CFUE
• Manufacturer: Freescale

Specifications of MC9S12DG128CFUE

• Cpu Family: HCS12
• Device Core Size: 16b
• Frequency (max): 50MHz
• Interface Type: SCI/SPI/I2C/CAN
• Total Internal Ram Size: 8KB
• # I/os (max): 91
• Number Of Timers - General Purpose: 8
• Operating Supply Voltage (typ): 2.5/5V
• Operating Supply Voltage (max): 2.75/5.25V
• Operating Supply Voltage (min): 2.25/2.35/4.5V
• On-chip Adc: 2(8-chx10-bit)
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 80
• Package Type: PQFP
• Program Memory Type: Flash
• Program Memory Size: 128KB
• Lead Free Status / RoHS Status: Compliant

And finally the frequency relationship is defined as
With the above values the resistance can be calculated. The example is shown for a loop bandwidth
f
The capacitance C
The capacitance C
A.5.3.2 Jitter Information
The basic functionality of the PLL is shown in Figure A-3. With each transition of the clock f
deviation from the reference clock f
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-4.
Freescale Semiconductor
C
=10KHz:
R
=
C
2
---------------------------- -
s
p
s
can now be calculated as:
should be chosen in the range of:
=
K
n
--------------------- -
n f
2
C
=
f
C
s
C
f
------------ -
VCO
f
2
20 C
ref
R
= 2* *50*10kHz/(316.7Hz/ )=9.9k =~ 10k
ref
is measured and input voltage to the VCO is adjusted
=
0.516
-------------- -
f
C
p
2
R
C
;
synr
s
=
10
0.9
+
1
Device User Guide — 9S12DT128DGV2/D V02.16
C
p
= 5.19nF =~ 4.7nF
= 470pF
= 50
cmp
, the
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