参数资料
型号: MC9S12C96CFA16
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP48
封装: LQFP-48
文件页数: 17/136页
文件大小: 2022K
代理商: MC9S12C96CFA16
Device User Guide — 9S12C128DGV1/D V01.05
113
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:
B.6.3.2 Jitter Information
The basic functionality of the PLL is shown in Figure B-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 B-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
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相关代理商/技术参数
参数描述
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MC9S12C96CFU 制造商:Freescale Semiconductor 功能描述:16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
MC9S12C96CFUE 功能描述:16位微控制器 - MCU 9S12C96 (KOI) - PB FREE RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
MC9S12C96CFUER 功能描述:16位微控制器 - MCU 9S12C96 (KOI) - PB FREE RoHS:否 制造商:Texas Instruments 核心:RISC 处理器系列:MSP430FR572x 数据总线宽度:16 bit 最大时钟频率:24 MHz 程序存储器大小:8 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:VQFN-40 安装风格:SMD/SMT
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