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| 型号： | MPC8377E-RDBA |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 27/127页 |
| 文件大小： | 0K |
| 描述： | BOARD REF DES MPC8377 REV 2.1 |
| 设计资源： | MPC8379E-RDB Ref Design Guide |
| 标准包装： | 1 |
| 系列： | PowerQUICC II™ PRO |
| 类型： | MPU |
| 适用于相关产品： | MPC8377E |
| 所含物品： | 板，CD |
| 相关产品： | MPC8378EVRANG-ND - MPU PWRQUICC II 800MHZ 689TEPBGA MPC8378EVRALG-ND - MPU PWRQUICC II 667MHZ 689TEPBGA MPC8378EVRAJF-ND - MPU PWRQUICC II 533MHZ 689TEPBGA MPC8378EVRAGD-ND - MPU PWRQUICC II 400MHZ 689TEPBGA MPC8379EVRANG-ND - MPU PWRQUICC II 800MHZ 689TEPBGA MPC8379EVRALG-ND - MPU PWRQUICC II 667MHZ 689TEPBGA MPC8379EVRAJF-ND - MPU PWRQUICC II 533MHZ 689TEPBGA MPC8379EVRAGD-ND - MPU PWRQUICC II 400MHZ 689TEPBGA MPC8377EVRALG-ND - MPU PWRQUICC II 667MHZ 689TEPBGA MPC8377EVRAJF-ND - MPU PWRQUICC II 533MHZ 689TEPBGA 更多... |
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MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 8
122
Freescale Semiconductor
The value of this resistance and the strength of the driver’s current source can be found by making two
measurements. First, the output voltage is measured while driving logic 1 without an external differential
termination resistor. The measured voltage is V1 = Rsource × Isource. Second, the output voltage is measured
while driving logic 1 with an external precision differential termination resistor of value Rterm. The
measured voltage is V2 =(1/(1/R1 +1/R2)) × Isource. Solving for the output impedance gives Rsource =
Rterm × (V1/V2 – 1). The drive current is then Isource =V1/Rsource.
This table summarizes the signal impedance targets. The driver impedance are targeted at minimum VDD,
nominal OVDD, 105°C.
25.5
Configuration Pin Muxing
The device 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 PORESET deasserts, at which time the input receiver is
disabled and the I/O circuit takes on its normal function. Careful board layout with stubless connections
to these pull-up/pull-down resistors coupled with the large value of the pull-up/pull-down resistor should
minimize the disruption of signal quality or speed for output pins thus configured.
25.6
Pull-Up Resistor Requirements
The device requires high resistance pull-up resistors (10 k
Ω is recommended) on open drain type pins
including I2C pins and IPIC interrupt pins.
For more information on required pull-up resistors and the connections required for the JTAG interface,
see AN3665, “MPC837xE Design Checklist.”
26 Ordering Information
Ordering information for the parts fully covered by this specification document is provided in
Table 83. Impedance Characteristics
Impedance
Local Bus, Ethernet,
DUART, Control,
Configuration, Power
Management
PCI Signals
(not including PCI
output clocks)
PCI Output Clocks
(including
PCI_SYNC_OUT)
DDR DRAM
Symbol
Unit
RN
42 Target
25 Target
42 Target
20 Target
Z0
W
RP
42 Target
25 Target
42 Target
20 Target
Z0
W
Differential
NA
ZDIFF
W
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MPC8377E-RDBA | 制造商:Freescale Semiconductor 功能描述:MPC837x Family Reference Desig |
| MPC8377EVRAFDA | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Processor Hardware Specifications |
| MPC8377EVRAFFA | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Processor Hardware Specifications |
| MPC8377EVRAFGA | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Processor Hardware Specifications |
| MPC8377EVRAGD | 功能描述:微处理器 - MPU PBGA W/ ENCR 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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