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| 型号： | DSP56F826BU80E |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 22/56页 |
| 文件大小： | 0K |
| 描述： | IC DSP 80MHZ 64KB FLASH 100LQFP |
| 标准包装： | 90 |
| 系列： | 56F8xx |
| 核心处理器： | 56800 |
| 芯体尺寸： | 16-位 |
| 速度： | 80MHz |
| 连通性： | EBI/EMI，SCI，SPI，SSI |
| 外围设备： | POR，WDT |
| 输入/输出数： | 46 |
| 程序存储器容量： | 67KB（33.5K x 16） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 4.5K x 16 |
| 电压 - 电源 (Vcc/Vdd)： | 2.25 V ~ 2.75 V |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 100-LQFP |
| 包装： | 托盘 |
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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
Ceramic Resonator
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.
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:
Rz = 1 to 3MΩ
fc = 4Mhz (optimized for 4MHz)
EXTAL XTAL
Rz
fc
Recommended Ceramic Resonator
Parameters:
Rz = 1 to 3 MΩ
fc = 4Mhz (optimized for 4MHz)
EXTAL XTAL
Rz
fc
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 制造商全称:Motorola, Inc 功能描述:Preliminary Technical Data DSP56F826 16-bit Digital Signal Processor |
| DSP56F826E | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:16-bit Digital Signal Controllers |
| DSP56F826EVM | 功能描述:开发板和工具包 - 其他处理器 Evaluation Kit For DSP56F826 RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
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