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| 型号： | MPC8536EAVTAVLA |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 1500 MHz, MICROPROCESSOR, PBGA783 |
| 封装： | 29 X 29 MM, 2.80 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, FCBGA-783 |
| 文件页数： | 21/127页 |
| 文件大小： | 1893K |
| 代理商： | MPC8536EAVTAVLA |
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Configuration Pin Muxing
MPC8536E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 3
Freescale Semiconductor
117
To measure Z0 for the single-ended drivers, an external resistor is connected from the chip pad to OVDD or GND. Then, the
value of each resistor is varied until the pad voltage is OVDD/2 (see Figure 77). The output impedance is the average of two
components, the resistances of the pull-up and pull-down devices. When data is held high, SW1 is closed (SW2 is open) and
RP is trimmed until the voltage at the pad equals OVDD/2. RP then becomes the resistance of the pull-up devices. RP and RN
are designed to be close to each other in value. Then, Z0 = (RP + RN)/2.
Figure 77. Driver Impedance Measurement
Table 81 summarizes the signal impedance targets. The driver impedances are targeted at minimum VDD, nominal OVDD,
105
°C.
3.9
Configuration Pin Muxing
The MPC8536E 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-k
Ω 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
Table 81. Impedance Characteristics
Impedance
Local Bus, Ethernet, DUART,
Control, Configuration, Power
Management
PCI
DDR DRAM
Symbol Unit
RN
45 Target
45 Target (cfg_pci_impd=1)
25 Target (cfg_pci_impd=0)
18 Target (full strength mode)
36 Target (full strength mode)
Z0
Ω
RP
45 Target
45 Target (cfg_pci_impd=1)
25 Target (cfg_pci_impd=0)
18 Target (full strength mode)
36 Target (full strength mode)
Z0
Ω
Note: Nominal supply voltages. See Table 1.
OVDD
OGND
RP
RN
Pad
Data
SW1
SW2
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| MPC8536EBVTAKG | 功能描述:微处理器 - MPU 32-BIT 600MHz 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 |
| MPC8536EBVTAKGA | 功能描述:微处理器 - MPU 8536 Encrypted 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 |
| MPC8536EBVTANG | 功能描述:微处理器 - MPU 32-BIT 800MHz 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 |
| MPC8536EBVTANGA | 功能描述:微处理器 - MPU 8536 Encrypted 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 |
| MPC8536EBVTAQG | 功能描述:微处理器 - MPU 32-BIT 1GHz 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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