MC9S12DG256BVPV Freescale Semiconductor, MC9S12DG256BVPV Datasheet - Page 109

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MC9S12DG256BVPV

Manufacturer Part Number
MC9S12DG256BVPV
Description
IC MCU 256K FLASH 25MHZ 112-LQFP
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet

Specifications of MC9S12DG256BVPV

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 16x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
112-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

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Part Number:
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Part Number:
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A.5.3 Phase Locked Loop
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 XFC Component Selection
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 VCO Gain at the desired VCO output frequency is approximated by:
The phase detector relationship is given by:
i
ch
is the current in tracking mode.
1
, f
1
and i
f
osc
ch
from Table A-16.
refdv+1
Figure A-2 Basic PLL functional diagram
Freescale Semiconductor, Inc.
1
For More Information On This Product,
f
ref
K
Go to: www.freescale.com
K
V
=
=
K
1
f
cmp
i
ch
e
Loop Divider
---------------------- -
Detector
f
K
Phase
1
synr+1
1
K
K
MC9S12DP256B Device User Guide — V02.14
f
V
1V
1
vco
C
s
VDDPLL
R
1
2
C
p
VCO
K
V
f
vco
109

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