MC9S12DT256MPVE Freescale Semiconductor, MC9S12DT256MPVE Datasheet - Page 1269

• Manufacturer Part Number: MC9S12DT256MPVE
• Description: IC MCU 256K FLASH 25MHZ 112-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12DT256MPVE

• Core Processor: HCS12
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: CAN, I²C, SCI, SPI
• Peripherals: PWM, WDT
• Number Of I /o: 91
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 12K x 8
• Voltage - Supply (vcc/vdd): 2.35 V ~ 5.25 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 112-LQFP
• Processor Series: S12D
• Core: HCS12
• Data Bus Width: 16 bit
• Data Ram Size: 12 KB
• Interface Type: CAN/I2C/SCI/SPI
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 91
• Number Of Timers: 1
• Operating Supply Voltage: 5 V to 2.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWHCS12
• Development Tools By Supplier: M68KIT912DP256
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 2 (8-ch x 10-bit)
• No. Of I/o's: 91
• Eeprom Memory Size: 4KB
• Ram Memory Size: 12KB
• Cpu Speed: 25MHz
• No. Of Timers: 1
• No. Of Pwm Channels: 8
• Digital Ic Case Style: LQFP
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS 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
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
Freescale Semiconductor
C
= 20 kHz:
0
Jitter Information
t
min1
t
nom
s
p
t
max1
can now be calculated as:
should be chosen in the range of:
1
C
s
f
=
C
R
----------------------
<
2
=
------------------------------------------ -
n
MC9S12XDP512 Data Sheet, Rev. 2.21
f
ref
C
2
---------------------------- -
=
C
----- -
20
2
2
Figure A-4. Jitter Definitions
is measured and input voltage to the VCO is adjusted
s
R
f
-------------- -
+
VCO
K
2
f
ref
=
n f
C
1
f
p
ref
0.516
-------------- -
f
C
+
C
=
Figure
C
----- -
=
10
2
R
2
s
2
----------------------------------------- -
;
t
minN
t
maxN
---- -
10
539.1Hz
synr
1
=
C
A-3. With each transition of the clock f
0.9
20 20kHz
P
3
= 470pF
f
+
C
1
f
<
C
= 5.5nF = ~ 4.7nF
------------ -
4 10
< 100kHz
f
ref
= 20
=
;
4.7k
=
0.9
Appendix A Electrical Characteristics
N-1
Figure
N
cmp
A-4.
, the
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