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参数资料
| 型号： | MC56F8247VLH |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, FLASH, 60 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | 10 X 10 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, PLASTIC, MS-026BCD, LQFP-64 |
| 文件页数： | 32/88页 |
| 文件大小： | 4050K |
| 代理商： | MC56F8247VLH |
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MC56F825x/MC56F824x Digital Signal Controller, Rev. 3
General System Control Information
Freescale Semiconductor
38
when selecting a crystal, because crystal parameters determine the component values required to provide maximum stability
and reliable startup. The load capacitance values used in the oscillator circuit design should include all stray layout capacitances.
The crystal and associated components should be mounted as near as possible to the EXTAL and XTAL pins to minimize output
distortion and startup stabilization time. When using low-frequency, low-power mode, the only external component is the
crystal itself. In the other oscillator modes, load capacitors (Cx, Cy) and feedback resistor (RF) are required. In addition, a series
resistor (RS) may be used in high-gain modes. Recommended component values appear in Table 27.
Figure 9. Typical Crystal Oscillator Circuit without Frequency Compensation Capacitor
Figure 10. Typical Crystal or Ceramic Resonator Circuit
5.4.3
Alternate External Clock Input
The recommended method of connecting an external clock appears in Figure 11. The external clock source is connected to the
CLKIN pin while:
both the EXT_SEL bit and the CLK_MODE bit in the OSCTL register are set, and
corresponding bits in the GPIOB_PER register in the GPIO module and the GPS_C0 bit in the GPS0 register in the
system integration module (SIM) are set to the correct values.
The external clock input must be generated using a relatively low-impedance driver with a maximum frequency not greater than
120 MHz.
EXTAL
XTAL
MC56F825x/MC56F824x
Crystal Frequency = 4–16 MHz
OSC_DIV2 = 1 if 16 MHz is chosen
RF
EXTAL
XTAL
C1
C2
MC56F825x/MC56F824x
Crystal Frequency = 4–16 MHz
OSC_DIV2 = 1 if 16 MHz is chosen
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC56F8247VLHR | 制造商:Freescale Semiconductor 功能描述:MICRO CONTROLLER |
| MC56F824X | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Digital Signal Controller Battery chargers and management |
| MC56F8255 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Digital Signal Controller Battery chargers and management |
| MC56F8255MLD | 功能描述:数字信号处理器和控制器 - DSP, DSC DSC 44 LQFP 64K FL RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT |
| MC56F8255VLD | 功能描述:数字信号处理器和控制器 - DSP, DSC DSC 44 LQFP 64K FL RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT |
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