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參數(shù)資料
| 型號： | DSP56F801FA80E |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | 16-bit Digital Signal Controllers |
| 中文描述： | 16位數(shù)字信號控制器 |
| 文件頁數(shù)： | 24/48頁 |
| 文件大?。?/td> | 375K |
| 代理商： | DSP56F801FA80E |
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56F801 Technical Data, Rev. 16
24
Freescale Semiconductor
is designed to have no external load capacitors present. As shown in
Figure 3-8
no external load capacitors
should be used.
The 56F80x components internally are modeled as a parallel resonant oscillator circuit to provide a
capacitive load on each of the oscillator pins (XTAL and EXTAL) of 10pF to 13pF over temperature and
process variations. Using a typical value of internal capacitance on these pins of 12pF and a value of 3pF
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 3-7 External Crystal Oscillator Circuit
3.5.2
It is also possible to drive the internal oscillator with a ceramic resonator, assuming the overall system
design can tolerate the reduced signal integrity. In
Figure 3-8
, a typical ceramic resonator circuit is
shown. 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 56F80x oscillator circuitry is designed to have no external load capacitors
present. As shown in
Figure 3-7
no external load capacitors should be used.
Ceramic Resonator
Figure 3-8 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 3 M
Ω
f
c
= 8MHz (optimized for 8MHz)
EXTAL XTAL
R
z
f
c
Recommended Ceramic Resonator
Parameters:
R
z
= 1 to 3 M
Ω
f
c
= 8MHz (optimized for 8MHz)
EXTAL XTAL
R
z
f
c
相關(guān)PDF資料 |
PDF描述 |
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| DSP56F801 | 16-bit Hybrid Controller(16位混合控制器) |
| DSP56F803E | 16-bit Digital Signal Controllers |
| DSP56F805E | 16-bit Digital Signal Controllers |
| DSP56F805FV80E | 16-bit Digital Signal Controllers |
| DSP56F805 | 16-bit Hybrid Controller(16位混合控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DSP56F801FA80E | 制造商:Freescale Semiconductor 功能描述:IC |
| DSP56F801PB | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-bit Digital Signal Processor |
| DSP56F802 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Digital Signal Controllers |
| DSP56F802PB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:56F802 16-Bit Hybrid Controller Product Brief |
| DSP56F802TA60 | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 60Mhz/30MIPS RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):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(fēng)格:SMD/SMT |
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