EP100: PowerPC 总线从设备

EP100 PowerPC总线从设备是专为PowerPC主机总线而设计的总线接口单元。它能够工作在任何60X兼容的总线架构。

它有两种用户接口,一个用于与片上和片外的用户逻辑和寄存器接口,第二个接口是与外部的异步SRAM和同步BURST SRAM直接接口。

PowerPC从设备是与PowerPC总线上的其他设备或系统控制器一起工作的。从设备可以被映射分配到特定的地址空间。进一步访问从设备可以是SRAM接口或基于地址映射的用户接口总线。地址映射控制器可以硬连线至核,或在运行时期间可以由用户提供。从设备支持常规大小的数据传输,还能够扩展数据传输大小至特定的MPC8260。

在PowerPC总线上的从设备处理地址线,可多达2个有待完成的请求。从器件处理一个请求的数据传输时,CPU可以开始第二个请求的地址保有。从设备还支持地址重试、独立的地址和数据总线的保有。在开始其数据保有之前,从设备检测数据总线的授权和数据总线忙的状态。

Features

  • Fully supports PowerPCTM 60x bus protocol including PowerPC 603, 604, 740, 750 and MPC8260.
  • Provide PowerPC bus device access to memory and devices on user interface.
  • Direct support for standard asynchronous SRAM and synchronous BURST SRAM.
  • Burst access support using conventional asynchronous SRAM.
  • Additional back-end interface bus for on-chip and off-chip logic and register access.
  • Back-end interface supports user device with various wait states.
  • Burst access support including MPC8260 extended transfer size.
  • Write buffer supports write posting for the back-end bus interface.
  • Handles separate address bus and data bus tenure.
  • Supports PowerPC address pipeline for improve performance.
  • Supports address bus retry generated by other external device.
  • Qualified address data bus grant through the use of bus busy signals.
  • Designed for ASIC and programmable logic device implementations in various system environments.
  • Fully static design with edge triggered flip-flops.
  • Optimized for ispXPGA product family.

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Block Diagram

性能和大小

以下是典型的性能和利用率的结果。

器件 利用率 性能
PFUs Slices LUTs 百分比
LFX1200B-4 220 580 6% 72Mhz
LFEC20 696 7% 92Mhz
LFXP10 696 14% 97Mhz
LFXP2-17E 500 6% 116Mhz

Ordering Information

This IP core is supported and sold by Eureka Technology, contact Eureka Technology at info@eurekatech.com or visit their website at www.eurekatech.com for more information.

文档

快速参考
标题 编号 版本 日期 格式 文件大小
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PowerPC Bus Slave Datasheet
EP100 6/22/2007 PDF 80.6 KB