參數(shù)資料
型號(hào)： DSP56F801
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： 16-bit Hybrid Controller(16位混合控制器)
中文描述： 16位混合控制器（16位混合控制器）
文件頁(yè)數(shù)： 21/44頁(yè)
文件大?。?/td> 858K
代理商： DSP56F801
External Clock Operation
56F801 Technical Data
21
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 9. 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 10
, 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 9
no external load capacitors should be used.
Ceramic Resonator
Figure 10. Connecting a Ceramic Resonator
Note:
Motorola recommends only two terminal ceramic resonators vs. three terminal
resonators (which contain an internal bypass capacitor to ground).
3.5.3
The recommended method of connecting an external clock is given in
Figure 11
. The external clock
source is connected to XTAL and the EXTAL pin is grounded.
External Clock Source
CL =
CL1 * CL2
CL1 + CL2
+ Cs =
+ 3 = 6 + 3 = 9pF
12 * 12
12 + 12
Recommended External Crystal
Parameters:
R
z
= 1 to 3 M
f
c
= 8MHz (optimized for 8MHz)
EXTAL XTAL
R
z
f
c
Recommended Ceramic Resonator
Parameters:
R
z
= 1 to 3 M
f
c
= 8MHz (optimized for 8MHz)
EXTAL XTAL
R
z
f
c
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DSP56F801-7UM 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:16-bit Digital Signal Controllers
DSP56F801E 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:56F801 16-bit Hybrid Controller
DSP56F801EVM 功能描述:開發(fā)板和工具包 - 其他處理器 Evaluation Kit For DSP56F801 RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評(píng)估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓:
DSP56F801EVMUM 制造商:未知廠家 制造商全稱:未知廠家 功能描述:56F801 Evaluation Module Hardware User＇s Manual
DSP56F801FA60 功能描述:數(shù)字信號(hào)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(chǔ)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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