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參數資料
| 型號： | DSP56F826BU80 |
| 廠商： | 飛思卡爾半導體(中國)有限公司 |
| 英文描述： | 16-bit Digital Signal Controllers |
| 中文描述： | 16位數字信號控制器 |
| 文件頁數： | 29/56頁 |
| 文件大?。?/td> | 700K |
| 代理商： | DSP56F826BU80 |
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External Clock Operation
56F826 Technical Data, Rev. 14
Freescale Semiconductor
29
as a typical circuit board trace capacitance the parallel load capacitance presented to the crystal is 9pF as
determined by the following equation:
This is the value load capacitance that should be used when selecting a crystal and determining the actual
frequency of operation of the crystal oscillator circuit.
Figure 3-9 Connecting to a Crystal Oscillator Circuit
3.6.2
It is also possible to drive the internal oscillator with a ceramic resonator, assuming the overall system
design can tolerate the reduced signal integrity. A typical ceramic resonator circuit is shown in
Figure 3-10
. Refer to supplier’s recommendations when selecting a ceramic resonator and associated
components. The resonator and components should be mounted as close as possible to the EXTAL and
XTAL pins. The internal 56F82x oscillator circuitry is designed to have no external load capacitors
present. As shown in
Figure 3-10
, no external load capacitors should be used.
Ceramic Resonator
Figure 3-10 Connecting a Ceramic Resonator
Note:
Freescale recommends only two terminal ceramic resonators vs. three terminal resonators
(which contain an internal bypass capacitor to ground).
CL =
CL1 * CL2
CL1 + CL2
+ Cs =
+ 3 = 6 + 3 = 9pF
12 * 12
12 + 12
Recommended External Crystal
Parameters:
R
z
= 1 to 3M
Ω
f
c
= 4Mhz (optimized for 4MHz)
EXTAL XTAL
R
z
f
c
Recommended Ceramic Resonator
Parameters:
R
z
= 1 to 3 M
Ω
f
c
= 4Mhz (optimized for 4MHz)
EXTAL XTAL
R
z
f
c
相關PDF資料 |
PDF描述 |
|---|---|
| DSP56F826BU80E | 16-bit Digital Signal Controllers |
| DSP56F826E | 16-bit Digital Signal Controllers |
| DSP56F826 | 16-bit Hybrid Controller(16位混合控制器) |
| DSP56F827E | 16-bit Digital Signal Controllers |
| DSP56F827FG80 | 16-bit Digital Signal Controllers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DSP56F826BU80E | 功能描述:數字信號處理器和控制器 - DSP, DSC 80Mhz/40MIPS RoHS:否 制造商:Microchip Technology 核心:dsPIC 數據總線寬度:16 bit 程序存儲器大小:16 KB 數據 RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數量:35 定時器數量:3 設備每秒兆指令數:50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風格:SMD/SMT |
| DSP56F826BU80E | 制造商:Freescale Semiconductor 功能描述:Digital Signal Processor IC DSP Type:Cor |
| DSP56F826BU80E | 制造商:Freescale Semiconductor 功能描述:DSP LQFP100 3.6V |
| DSP56F826D | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Preliminary Technical Data DSP56F826 16-bit Digital Signal Processor |
| DSP56F826E | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Digital Signal Controllers |
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