MC9S12E128CFU Freescale Semiconductor, MC9S12E128CFU Datasheet - Page 577

• Manufacturer Part Number: MC9S12E128CFU
• Description: IC MCU 128K FLASH 25MHZ 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12E128CFU

• Core Processor: HCS12
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, I²C, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 60
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.35 V ~ 2.75 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Data Bus Width: 16 bit
• Data Ram Size: 8 KB
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 60
• Number Of Timers: 16 bit
• Operating Supply Voltage: 3.135 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• On-chip Dac: 8 bit, 2 Channel
• For Use With: M68EVB912E128 - BOARD EVAL FOR MC9S12E128/64
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: No RoHS Version Available

K
A.3.3
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.3.3.1
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:
K
The phase detector relationship is given by:
i
Freescale Semiconductor
ch
V
is the current in tracking mode.
OSC
=
1
=
, f
K
1
–
= 4MHz and a 25MHz bus clock.
and i
1
i
ch
Phase Locked Loop
XFC Component Selection
e
ch
----------------------- -
f
K
K
from
1
f
1
–
osc
V
f
1V
vco
Table
=
–
refdv+1
A-13.
100
= 316.7Hz/
1
Figure A-2. Basic PLL functional diagram
e
MC9S12E128 Data Sheet, Rev. 1.07
----------------------
f
60 50
ref
VDDPLL
–
VCO
100
–
= 50MHz and f
= -90.48MHz/V
f
cmp
C
C
p
Loop Divider
s
Detector
Phase
synr+1
K
ref
1
R
= 1MHz. E.g., these frequencies are used
XFC Pin
Appendix A Electrical Characteristics
1
2
VCO
K
V
f
vco
577