MC9S12XDT512CAA Freescale, MC9S12XDT512CAA Datasheet - Page 1268

• Manufacturer Part Number: MC9S12XDT512CAA
• Manufacturer: Freescale

Specifications of MC9S12XDT512CAA

• Cpu Family: HCS12
• Device Core Size: 16b
• Frequency (max): 40MHz
• Interface Type: CAN/I2C/SCI/SPI
• Total Internal Ram Size: 32KB
• # I/os (max): 59
• Number Of Timers - General Purpose: 12
• Operating Supply Voltage (typ): 2.5/5V
• Operating Supply Voltage (max): 2.75/5.5V
• Operating Supply Voltage (min): 2.35/3.15V
• On-chip Adc: 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: 512KB
• Lead Free Status / RoHS Status: Compliant

Appendix A Electrical Characteristics
A.5.3
The oscillator provides the reference clock for the PLL. The PLL´s voltage controlled oscillator (VCO) is
also the system clock source in self clock mode.
A.5.3.1
This section describes the selection of the XFC components to achieve a good filter characteristics.
The following procedure can be used to calculate the resistance and capacitance values using typical values
for K
The grey boxes show the calculation for f
are used for f
The VCO gain at the desired VCO frequency is approximated by:
The phase detector relationship is given by:
i
The loop bandwidth f
typical values are 50. = 0.9 ensures a good transient response.
1270
ch
is the current in tracking mode.
1
, f
1
f
and i
osc
Phase Locked Loop
OSC
XFC Component Selection
ch
from
= 4-MHz and a 40-MHz bus clock.
K
refdv+1
V
C
1
Table
=
should be chosen to fulfill the Gardner’s stability criteria by at least a factor of 10,
K
K
1
A-23.
f
e
=
ref
--------------------------- -
f 1 f vco
Figure A-3. Basic PLL Functional Diagram
–
K 1 1V
V
i
DDPLL
–
ch
MC9S12XDP512 Data Sheet, Rev. 2.21
K
V
D
VCO
fcmp
=
C
–
p
C
=
= 80 MHz and f
3.5 A
s
Detector
–
Loop Divider
Phase
195MHz V
synr+1
KF
1
R
–
154MHz
e
ref
126 80
------------------- -
–
V
= 4 MHz. For example, these frequencies
195
XFC Pin
–
=
539.1Hz
1
2
= -154.0MHz/V
VCO
KV
Freescale Semiconductor
f
vco