- 您现在的位置：买卖IC网 > PDF目录80399 > MPC8555VTAPFX (FREESCALE SEMICONDUCTOR INC) 32-BIT, 833 MHz, RISC PROCESSOR, PBGA783 PDF资料下载
参数资料
| 型号： | MPC8555VTAPFX |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 833 MHz, RISC PROCESSOR, PBGA783 |
| 封装： | 29 X 29 MM, 3.75 MM HEIGHT, 1 MM PITCH, LEAD FREE, FLIP CHIP, PLASTIC, BGA-783 |
| 文件页数： | 75/88页 |
| 文件大小： | 1244K |
| 代理商： | MPC8555VTAPFX |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页当前第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页
MPC8555E PowerQUICC III Integrated Communications Processor Hardware Specifications, Rev. 4
Freescale Semiconductor
77
System Design Information
17 System Design Information
This section provides electrical and thermal design recommendations for successful application of the
MPC8555E.
17.1
System Clocking
The MPC8555E includes five PLLs.
1. The platform PLL (AVDD1) generates the platform clock from the externally supplied SYSCLK
input. The frequency ratio between the platform and SYSCLK is selected using the platform PLL
ratio configuration bits as described in Section 15.2, “Platform/System PLL Ratio.”
2. The e500 Core PLL (AVDD2) generates the core clock as a slave to the platform clock. The
frequency ratio between the e500 core clock and the platform clock is selected using the e500
PLL ratio configuration bits as described in Section 15.3, “e500 Core PLL Ratio.”
3. The CPM PLL (AVDD3) is slaved to the platform clock and is used to generate clocks used
internally by the CPM block. The ratio between the CPM PLL and the platform clock is fixed and
not under user control.
4. The PCI1 PLL (AVDD4) generates the clocking for the first PCI bus.
5. The PCI2 PLL (AVDD5) generates the clock for the second PCI bus.
17.2
PLL Power Supply Filtering
Each of the PLLs listed above is provided with power through independent power supply pins (AVDD1,
AVDD2, AVDD3, AVDD4, and AVDD5 respectively). The AVDD level should always be equivalent to VDD,
and preferably these voltages will be derived directly from VDD through a low frequency filter scheme
such as the following.
There are a number of ways to reliably provide power to the PLLs, but the recommended solution is to
provide five independent filter circuits as illustrated in Figure 49, one to each of the five AVDD pins. By
providing independent filters to each PLL the opportunity to cause noise injection from one PLL to the
other is reduced.
This circuit is intended to filter noise in the PLLs resonant frequency range from a 500 kHz to 10 MHz
range. It should be built with surface mount capacitors with minimum Effective Series Inductance (ESL).
Consistent with the recommendations of Dr. Howard Johnson in High Speed Digital Design: A Handbook
of Black Magic (Prentice Hall, 1993), multiple small capacitors of equal value are recommended over a
single large value capacitor.
Each circuit should be placed as close as possible to the specific AVDD pin being supplied to minimize
noise coupled from nearby circuits. It should be possible to route directly from the capacitors to the AVDD
pin, which is on the periphery of the 783 FC-PBGA footprint, without the inductance of vias.
相关PDF资料 |
PDF描述 |
|---|---|
| MPC8560PXAQFC | 32-BIT, 1000 MHz, RISC PROCESSOR, PBGA783 |
| MK1493-01GLFTR | 100 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| MK3234-01STR | 50 MHz, OTHER CLOCK GENERATOR, PDSO16 |
| MPC5602BF1VLQ4R | MICROCONTROLLER, PQFP144 |
| MPC5602CF1MLL6 | MICROCONTROLLER, PQFP100 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MPC8555VTAQF | 功能描述:IC MPU POWERQUICC III 783-FCPBGA RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微处理器 系列:MPC85xx 标准包装:1 系列:MPC85xx 处理器类型:32-位 MPC85xx PowerQUICC III 特点:- 速度:1.2GHz 电压:1.1V 安装类型:表面贴装 封装/外壳:783-BBGA，FCBGA 供应商设备封装:783-FCPBGA（29x29） 包装:托盘 |
| MPC855TCVR50D4 | 功能描述:微处理器 - MPU POWER QUICC-NO LEAD RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
| MPC855TCVR50D4R2 | 功能描述:微处理器 - MPU POWER QUICC RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
| MPC855TCVR66D4 | 功能描述:微处理器 - MPU POWER QUICC-NO LEAD RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
| MPC855TCZP50D4 | 制造商:Freescale Semiconductor 功能描述: |
发布紧急采购，3分钟左右您将得到回复。