MC9S12C128CPBE Freescale Semiconductor, MC9S12C128CPBE Datasheet - Page 666

• Manufacturer Part Number: MC9S12C128CPBE
• Description: IC MCU 128K FLASH 25MHZ 52-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12C128CPBE

• Core Processor: HCS12
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.35 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Appendix A Electrical Characteristics
A.4.3
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.4.3.1
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
for f
The VCO Gain at the desired VCO frequency is approximated by:
The phase detector relationship is given by:
i
666
ch
is the current in tracking mode.
OSC
1
, f
1
= 4MHz and a 25MHz bus clock.
f
and i
osc
Phase Locked Loop
XFC Component Selection
ch
from
refdv+1
K
V
1
Table
=
K
K
Φ
A-17.
f
ref
1
=
Figure A-2. Basic PLL Functional Diagram
⋅
V
e
DDPLL
–
(
---------------------- -
f
K
MC9S12C-Family / MC9S12GC-Family
i
1
ch
1
–
⋅
D
f
1V
VCO
f
vco
⋅
cmp
K
Cp
=
)
Cs
V
= 50MHz and f
–
Detector
Loop Divider
Phase
Rev 01.24
100
synr+1
KF
R
1
⋅
e
= 316.7Hz/Ω
(
--------------------- -
60 50
–
100
–
ref
= 1MHz. E.g., these frequencies are used
XFC Pin
)
= -90.48MHz/V
1
2
VCO
KV
Freescale Semiconductor
f
vco