参数资料
型号: MPC8548EPXATGA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 1200 MHz, MICROPROCESSOR, PBGA783
封装: 29 X 29 MM, 1 MM PITCH, PLASTIC, BGA-783
文件页数: 34/143页
文件大小: 1460K
代理商: MPC8548EPXATGA
MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 8
Freescale Semiconductor
129
System Design Information
There are a number of ways to reliably provide power to the PLLs, but the recommended solution is to
provide independent filter circuits per PLL power supply as illustrated in Figure 56, one to each of the
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 footprint, without the inductance of vias.
Figure 56 through Figure 58 shows the PLL power supply filter circuits.
Figure 56. PLL Power Supply Filter Circuit with PLAT Pins
Figure 57. PLL Power Supply Filter Circuit with CORE Pins
Figure 58. PLL Power Supply Filter Circuit with PCI/LBIU Pins
The AVDD_SRDS signal provides power for the analog portions of the SerDes PLL. To ensure stability of
the internal clock, the power supplied to the PLL is filtered using a circuit similar to the one shown in
following figure. For maximum effectiveness, the filter circuit is placed as closely as possible to the
AVDD_SRDS ball to ensure it filters out as much noise as possible. The ground connection should be near
the AVDD_SRDS ball. The 0.003-F capacitor is closest to the ball, followed by the two 2.2 F capacitors,
and finally the 1
Ω resistor to the board supply plane. The capacitors are connected from AVDD_SRDS to
the ground plane. Use ceramic chip capacitors with the highest possible self-resonant frequency. All traces
should be kept short, wide and direct.
VDD
AVDD_PLAT
2.2 F
GND
Low ESL Surface Mount Capacitors
150
Ω
VDD
AVDD_CORE
2.2 F
GND
Low ESL Surface Mount Capacitors
180
Ω
VDD
AVDD_PCI/AVDD_LBIU
2.2 F
GND
Low ESL Surface Mount Capacitors
10
Ω
相关PDF资料
PDF描述
MPC8548ECVTATGA 32-BIT, 1200 MHz, MICROPROCESSOR, PBGA783
MPC8548EPXAQGB 32-BIT, 1000 MHz, MICROPROCESSOR, PBGA783
MPC8548EPXAVHA 32-BIT, 1500 MHz, MICROPROCESSOR, PBGA783
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参数描述
MPC8548EPXATGB 功能描述:微处理器 - MPU FG PQ38 8548 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
MPC8548EPXAUJA 制造商:Freescale Semiconductor 功能描述:MPC85XX RISC 32-BIT CMOS 1.333GHZ 1.8V/2.5V/3.3V 783-PIN BGA - Bulk
MPC8548EPXAUJB 功能描述:微处理器 - MPU FG PQ38 8548 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
MPC8548EPXAUJC 功能描述:微处理器 - MPU REV2.1.3 FG part 1333 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
MPC8548EPXAUJD 功能描述:微处理器 - MPU PQ38 PB ST WE 1333 R3.0 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