收藏本站
PCI Bus
The PCI bridge is implemented on the MPC8272 Local Bus. Due to PCI Standard
restrictions, no other application can reside on the local bus. The PCI bus can operate at
frequencies of 25MHz up to 66MHz @ 3.3V only. The 3.3V restriction is due to the
MPC8272 which is not 5V compliant. The PCI bus layout is shown in Figure 5-8 Special
care was taken when the layout of the MPC8272ADS was done so that the PCI standard
recommendations are followed strictly.
Main Clock
66MHz
JTAG
PCI Clock
PCI Clock
CLKIN1
PowerQUICC II
CLKIN2
PCI
Clock
Distribution
PCI Clock
PCI Clock
PCI
IRQ
DLLOUT
Arbiter
PCI Clock
PCI Bus
Interrupt
Controller
Figure 5-8. PCI Bus Scheme
The clock source for the MPC8272 is main clock 100MHz clock oscillator. The PCI Clock
is derived internally from the main clock and output at DLLOUT. That clock is then
distributed to each PCI device on the bus in a way that they are all synchronized (by keeping
all clock traces the same length). The PCI Clock is also fed back to the MPC8272 for
synchronization and skew elimination purposes.
An interrupt from any PCI slot is handled by a simple generic Interrupt Controller. Each
slot can generate up to four interrupts for a total of twelve interrupts that the controller will
support. It will be made of two register mapped in a dedicated CS region. One is an
Interrupt Register (see Table 5-3) and the second is Interrupt Mask Register (see Table 5-4).
A simple priority scheme is devised to allow the controller to support more than one
interrupt concurrently.
Chapter 5. Module Design
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
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
MPC8377E-MDS-PB BOARD MODULAR DEV SYSTEM
MPC8569E-MDS-PB BOARD MOD DEV SYSTEM MPC8569
MPC8572EAMC MPC8572 AMC RAPID SYSTEM
相关代理商/技术参数
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
MPC8272CVRMIBA 功能描述:微处理器 - MPU 266 MHz 505.4 MIPS 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
MPC8272CVRP 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:PowerQUICC II⑩ Family Hardware Specifications
MPC8272CVRPIEA 功能描述:微处理器 - MPU 300 MHz 570 MIPS 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