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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： 38/143页
文件大小： 1460K
代理商： MPC8548EPXATGA
MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 8
132
Freescale Semiconductor
System Design Information
Figure 60. Driver Impedance Measurement
Table 86 summarizes the signal impedance targets. The driver impedances are targeted at minimum VDD,
nominal OVDD, 105°C.
22.8
Configuration Pin Muxing
The MPC8548E provides the user with power-on configuration options which can be set through the use
of external pull-up or pull-down resistors of 4.7 k
Ω on certain output pins (see customer visible
configuration pins). These pins are generally used as output only pins in normal operation.
While HRESET is asserted however, these pins are treated as inputs. The value presented on these pins
while HRESET is asserted, is latched when HRESET deasserts, at which time the input receiver is disabled
and the I/O circuit takes on its normal function. Most of these sampled configuration pins are equipped
with an on-chip gated resistor of approximately 20 k
Ω. This value should permit the 4.7-kΩ resistor to pull
the configuration pin to a valid logic low level. The pull-up resistor is enabled only during HRESET (and
for platform/system clocks after HRESET deassertion to ensure capture of the reset value). When the input
receiver is disabled the pull-up is also, thus allowing functional operation of the pin as an output with
minimal signal quality or delay disruption. The default value for all configuration bits treated this way has
been encoded such that a high voltage level puts the device into the default state and external resistors are
needed only when non-default settings are required by the user.
Careful board layout with stubless connections to these pull-down resistors coupled with the large value
of the pull-down resistor should minimize the disruption of signal quality or speed for output pins thus
configured.
Table 86. Impedance Characteristics
Impedance
Local Bus, Ethernet, DUART, Control,
Configuration, Power Management
PCI
DDR DRAM
Symbol
Unit
RN
43 Target
25 Target
20 Target
Z0
W
RP
43 Target
25 Target
20 Target
Z0
W
Note: Nominal supply voltages. See Table 1, Tj = 105°C.
OVDD
OGND
Pad
Data
SW1
SW2
RN
RP
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
MPC8548ECPXAUJA 32-BIT, 1333 MHz, MICROPROCESSOR, PBGA783
MPC8548ECHXATG 32-BIT, 1200 MHz, MICROPROCESSOR, CBGA783
相关代理商/技术参数
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
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