MC9S12E128CPV Freescale Semiconductor, MC9S12E128CPV Datasheet - Page 578
MC9S12E128CPV
Manufacturer Part Number
MC9S12E128CPV
Description
Microcontrollers (MCU) 16 Bit 16MHz
Manufacturer
Freescale Semiconductor
Datasheet
1.MC9S12E128CPV.pdf
(606 pages)
Specifications of MC9S12E128CPV
Data Bus Width
16 bit
Program Memory Type
Flash
Program Memory Size
128 KB
Data Ram Size
8 KB
Interface Type
SCI, SPI
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
92
Number Of Timers
16 bit
Operating Supply Voltage
3.135 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
LQFP-112
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
On-chip Dac
8 bit, 2 Channel
Lead Free Status / Rohs Status
No RoHS Version Available
Available stocks
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Quantity
Price
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Part Number:
MC9S12E128CPVE
Manufacturer:
Freescale Semiconductor
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10 000
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Appendix A Electrical Characteristics
The loop bandwidth f
typical values are 50. = 0.9 ensures a good transient response.
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.3.3.2
The basic functionality of the PLL is shown in
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
578
C
=10kHz:
f
C
<
------------------------------------------
R
2
Jitter Information
=
+
C
2
---------------------------- -
s
p
s
can now be calculated as:
should be chosen in the range of:
1
f
C
ref
=
+
K
should be chosen to fulfill the Gardner’s stability criteria by at least a factor of 10,
n
--------------------- -
n f
2
2
=
C
f
s
C
C
f
-------------
----- -
10
1
VCO
f
2
20 C
ref
R
= 2* *50*10kHz/(316.7Hz/ )=9.9k =~10k
ref
MC9S12E128 Data Sheet, Rev. 1.07
f
is measured and input voltage to the VCO is adjusted
=
f
0.516
-------------- -
f
C
C
C
p
<
2
< 25kHz
R
------------ -
4 10
f
C
ref
;
Figure
synr
s
=
;
10
0.9
A-2. With each transition of the clock f
+
=
1
0.9
C
p
= 5.19nF =~ 4.7nF
= 470pF
= 50
Freescale Semiconductor
Figure
cmp
A-3.
, the
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