參數(shù)資料
型號: MC9S12DP512CPV
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, PQFP112
封裝: ROHS COMPLIANT, LQFP-112
文件頁數(shù): 10/124頁
文件大?。?/td> 4657K
代理商: MC9S12DP512CPV
MC9S12DP512 Device Guide V01.25
107
A.5.3 Phase Locked Loop
The oscillator provides the reference clock for the PLL. The PLLs 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.
Figure A-3 Basic PLL functional diagram
The following procedure can be used to calculate the resistance and capacitance values using typical
values for K1, f1 and ich from Table A-16.
The grey boxes show the calculation for fVCO = 50MHz and fref = 1MHz. E.g., these frequencies are used
for fOSC = 4MHz and a 25MHz bus clock.
The VCO Gain at the desired VCO frequency is approximated by:
NOTES:
1. Depending on the crystal a damping series resistor might be necessary
2. fosc = 4MHz, C = 22pF.
3. Maximum value is for extreme cases using high Q, low frequency crystals
4. Only valid if Pierce oscillator/external clock mode is selected
fosc
1
refdv+1
fref
Phase
Detector
VCO
KV
1
synr+1
fvco
Loop Divider
KΦ
1
2
fcmp
Cs
R
Cp
VDDPLL
XFC Pin
K
V
K
1 e
f
1
f
vco
()
K
1
1V
-----------------------
=
100
e
60
50
()
100
------------------------
=
= -90.48MHz/V
相關(guān)PDF資料
PDF描述
MC9S12DT512VPV 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC9S12DP512CPVER 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC9S12DJ512CPVR2 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC9S12DT512CPVR2 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC9S12DP512MPVE 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC9S12DP512CPVE 功能描述:16位微控制器 - MCU 16 BIT 25MHz RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
MC9S12DP512CPVER 功能描述:16位微控制器 - MCU 512K FLASH HCS12 MCU RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
MC9S12DP512CPVER 制造商:Freescale Semiconductor 功能描述:Microcontroller
MC9S12DP512MPVE 功能描述:16位微控制器 - MCU 16 Bit 25MHz RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
MC9S12DP512MPVE 制造商:Freescale Semiconductor 功能描述:16-Bit Microcontroller IC