參數(shù)資料
型號: 9S12H256BDGV1
英文描述: 9S12H256B Device Guide
中文描述: 9S12H256B設(shè)備指南
文件頁數(shù): 109/130頁
文件大小: 2171K
代理商: 9S12H256BDGV1
109
A.4.3 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.4.3.1 XFC Component Selection
This section describes the selection of the XFC components to achieve a good filter characteristics.
Figure A-2 Basic PLL functional diagram
The following procedure can be used to calculate the resistance and capacitance values using typical
values for K
1
, f
1
and i
ch
from
Table A-15
.
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.
3. XCLKS =1 during reset
f
osc
1
refdv+1
f
ref
Phase
Detector
VCO
K
V
1
synr+1
f
vco
Loop Divider
K
Φ
1
2
f
cmp
C
s
R
C
p
VDDPLL
K
V
K
1
e
f
K
1
1V
vco
-----------f
)
=
K
Φ
i
ch
K
V
=
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
相關(guān)PDF資料
PDF描述
9S12KT256DGV1 MC9S12KT256 Device User Guide
9S12T64AF16V1 9S12T64 Device Guide
9S12XDP512DGV1 Device User Guide for Mask Set 0L40V ( First Silicon)
9S12XDP512DGV2 Device User Guide for Mask Set L15Y - (Second Silicon - Enhanced Feature Set)
9V3 ELEMENT 10 MICRON E MEDIA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
9S12HN64 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Microcontroller
9S12HZ128 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Microcontroller
9S12HZ256 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Microcontroller
9S12HZ64 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Microcontroller
9S12KT256DGV1 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MC9S12KT256 Device User Guide