參數(shù)資料
型號: SC515847MFU
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
封裝: PLASTIC, LQFP-80
文件頁數(shù): 28/142頁
文件大?。?/td> 6464K
代理商: SC515847MFU
Device User Guide — 9S12DT128DGV2/D V02.15
123
Freescale Semiconductor
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
fC=10KHz:
The capacitance Cs can now be calculated as:
The capacitance Cp should be chosen in the range of:
A.5.3.2 Jitter Information
The basic functionality of the PLL is shown in Figure A-3. With each transition of the clock fcmp, the
deviation from the reference clock fref is measured and input voltage to the VCO is adjusted
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 Figure A-4.
n
f
VCO
f
ref
-------------
2
synr
1
+
()
==
= 50
R
2
π nf
C
KΦ
-----------------------------
=
= 2*
π*50*10kHz/(316.7Hz/)=9.9k =~ 10k
C
s
2
ζ
2
π f
C R
----------------------
0.516
f
C R
---------------
ζ 0.9
=
()
;
=
= 5.19nF =~ 4.7nF
C
s 20
C
p
C
s 10
≤≤
Cp = 470pF
相關(guān)PDF資料
PDF描述
MC9S12DJ128VPV 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC9S12DJ128CFUE 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
MC9S12DG128CPVE 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC9S12DJ512VPVR2 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC9S12DT512CPV 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC515848 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Device User Guide
SC515849 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:MC9S12DT128 Device User Guide V02.09
SC516/WH 制造商:CQR Security 功能描述:REED AND MAGNET HOUSING
SC51601FBR2 制造商:Motorola Inc 功能描述:
SC51613DWR2 制造商:Motorola Inc 功能描述: