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PCI Bus
.
E 2 PROM Socket
DATA(0:7)
ADDRESS(17:31)
I/O(7:0)
A(14:0)
BCSR
POE
OE
CS0
CS4
E 2 PROM
CS
WE0
CS
WE
CE
Figure 5-7. E 2 PROM Connection Scheme
Additional address lines are connected to the socket according to the JEDEC format as an
option to use E 2 PROM up to 32 KByte.
5.9
PCI Bus
The MPC8272 has a PCI module which enables it to act as an host (Master) or a target. On
this board, the MPC8272 serves only as a PCI host - a bridge between the PCI Bus and the
PowerPC core.
The MPC8272 PCI Bridge is designed to connect the PowerPC processor and memory
system to the PCI system bus, to which I/O components are connected. The PCI Bridge
enables the MPC8272 to gluelessly bridge PCI masters and agents to a PowerPC system
host. It uses a 32-bit multiplexed, address/data bus that can run from 25MHz up to 66MHz.
The interface provides address and data parity with error checking and reporting. It also
provides three physical address spaces: 32-bit address memory; 32-bit address I/O; and the
PCI configuration space.
The MPC8272 also includes an on-chip arbiter which enables arbitration of up to three PCI
masters. Only three PCI slots are supported on the MPC8272ADS because of the Arbiter
capacity. Each slot can host either a PCI master or PCI target. The MPC8272 as a Bridge
can support more PCI devices but that will require extra slots that can host PCI targets only.
Therefore, to avoid dedicated slots for PCI targets, only three slots are implemented.
MPC8272ADS User Guide
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相关代理商/技术参数
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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