参数资料
型号: MPC8272ADS
厂商: Freescale Semiconductor
文件页数: 93/158页
文件大小: 0K
描述: KIT DEVELOPMENT MPC8272
标准包装: 1
类型: MPU
适用于相关产品: MPC8272
所含物品:
Power Supply
Table 7-2. Maximum Power Consumption Per Add-In Card (continued)
Power Rail
-12V
Add-In Card
100mA
7.1.1
5-V Rail
Some of the MPC8272ADS peripherals (not including the PCI add-in cards that should be
3.3 V only on the PCI interface, but can use 5 V for other components on-board) reside on
the 5-V bus. Because the MPC8272 is not 5-V tolerant, buffering is provided between 5V
peripherals and the MPC8272, protecting the MPC8272 from the higher voltage level.
7.1.2
3.3-V Rail
The MPC8272, SDRAM, PCI add-in cards, address and data buffers are powered by the 3.3
bus, which is produced from the ATX power supply.
7.1.3
5-V Standby Rail
The 5V standby power rail comes from the ATX Power Supply. Its only use is to power the
logic required to support the power button in the front panel on the ATX chassis.
7.1.4
V DDH Rail
The MPC8272 V DDH power bus (3.3 V) is produced from the 5-V bus using a low-voltage
drop linear voltage regulator MIC29501-3.3BU, made by Micrel.
A production option is made so that the level on this bus may be varied by means of
trimming the potentiometer TR2. Although this option requires replacing some
components, it allows the V DDH to be in the range of 3.0 V–3.6 V.
7.1.4.1
V DDL Bus
The MPC8272 internal logic and the PLL are powered with a lower-voltage power source,
whose voltage may be in the range of 1.3V–1.7V.
A trimming potentiometer does the fine tuning within a range.
Changing the voltage to the core logic of the MPC8272 obviously has an influence over the
maximal speed of the core. The power-speed trade-off is that lower operation speeds may
be obtained with lower voltage supply.
Chapter 7. Physical Properties
相关PDF资料
PDF描述
MPC8308-RDB BOARD REF DESIGN MPC8308
MPC8309-KIT KIT EVALUATION FOR MPC830X
MPC8315E-RDB PROCESSOR BOARD PWRQUICCII PBGA
MPC8349E-MITX-GP KIT REFERENCE PLATFORM MPC8349E
MPC8349E-MITXE BOARD REFERENCE FOR MPC8349
相关代理商/技术参数
参数描述
MPC8272CVR 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:MPC8272 PowerQUICC II Family Hardware Specifications
MPC8272CVRB 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8272CVRE 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8272CVRI 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8272CVRM 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications