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| 型号： | MPC8323ECZQAFDC |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 76/82页 |
| 文件大小： | 0K |
| 描述： | IC MPU PWRQUICC II 516-PBGA |
| 产品培训模块： | MPC8323E PowerQUICC II Pro Processor |
| 标准包装： | 40 |
| 系列： | MPC83xx |
| 处理器类型： | 32-位 MPC83xx PowerQUICC II Pro |
| 速度： | 333MHz |
| 电压： | 1V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 516-BBGA |
| 供应商设备封装： | 516-FPBGA（27x27） |
| 包装： | 托盘 |
| 配用： | MPC8323E-RDB-ND - BOARD REFERENCE DESIGN |
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MPC8323E PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 4
78
Freescale Semiconductor
System Design Information
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 45. Driver Impedance Measurement
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.
nominal OVDD, 105°C.
24.6
Configuration Pin Multiplexing
The MPC8323E 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.
Table 65. Impedance Characteristics
Impedance
Local Bus, Ethernet, DUART, Control,
Configuration, Power Management
PCI
DDR DRAM
Symbol
Unit
RN
42 Target
25 Target
20 Target
Z0
W
RP
42 Target
25 Target
20 Target
Z0
W
Differential
NA
ZDIFF
W
OVDD
OGND
RP
RN
Pad
Data
SW1
SW2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MPC8323ECZQAFDCA | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Integrated Communications Processor Family Hardware Specifications |
| MPC8323EEC | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC? II Pro Integrated Communications Processor Family Hardware Specifications |
| MPC8323E-MDS-PB | 功能描述:开发板和工具包 - 其他处理器 MPC8323E PROCESSOR BOARD RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| MPC8323E-RDB | 功能描述:开发板和工具包 - 其他处理器 REFERENCE DESIGN PQII PR RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| MPC8323E-RDB | 制造商:Freescale Semiconductor 功能描述:MPC8323E Integrated Multiservice Gateway |
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