pci 9080 表格 的 内容
plx 技术, inc., 1997 页 iii 版本 1.01
表格 的 内容
1. 一般 描述 ..............................................................................................................................................1
1.1 产品 为 这 pci 9080 .......................................................................................................................2
1.1.1 pci adapter cards.............................................................................................................................................................. 2
1.1.2 embedded 系统............................................................................................................................................................ 2
1.2 主要的 特性..................................................................................................................................................3
1.3 兼容性 的 pci 9080 with pci 9060, 9060es, 和 9060sd................................................................4
1.3.1 管脚 兼容性 ................................................................................................................................................................. 4
1.3.2 寄存器 兼容性......................................................................................................................................................... 4
1.4 comparison 的 pci 9060, pci 9060es, pci 9060sd, 和 pci 9080..............................................................5
2. 总线 运作............................................................................................................................................................6
2.1 pci 总线 循环.....................................................................................................................................................6
2.1.1 pci 目标 command 代号.............................................................................................................................................. 6
2.1.2 pci 主控 command 代号 ............................................................................................................................................. 6
2.1.2.1 dma 主控 command 代号 ....................................................................................................................................... 6
2.1.2.2 直接 local 至 pci command 代号 .............................................................................................................................6
2.1.3 pci arbitration .................................................................................................................................................................... 6
2.2 local 总线 循环...............................................................................................................................................7
2.2.1 local 总线 arbitration........................................................................................................................................................... 7
2.2.2 local 总线 直接 主控...................................................................................................................................................... 7
2.2.3 local 总线 直接 从动装置........................................................................................................................................................ 7
2.2.3.1 准备好/wait 状态 控制 ............................................................................................................................................... 7
2.2.3.1.1 wait state—local 一侧............................................................................................................................................. 7
2.2.3.1.2 wait state—pci 一侧 ............................................................................................................................................... 8
2.2.3.2 burst 模式 和 持续的 burst 模式 (bterm “burst terminate” 模式)..................................................................... 8
2.2.3.2.1 burst 模式 ............................................................................................................................................................... 8
2.2.3.2.2 持续的 burst 模式 (bterm “burst terminate” 模式)......................................................................................... 8
2.2.3.2.3 partial lword accesses ............................................................................................................................................ 9
2.2.3.3 恢复 states ............................................................................................................................................................. 9
2.2.3.4 local 总线 读 accesses .............................................................................................................................................. 9
2.2.3.5 local 总线 写 accesses .............................................................................................................................................. 9
2.2.3.6 直接 从动装置 写 accesses—8- 和 16-位 buses........................................................................................................ 9
2.2.3.7 local 总线 数据 parity ..................................................................................................................................................... 9
2.2.3.8 local 总线 little/big endian ............................................................................................................................................. 9
2.2.3.8.1 32 位 local bus—big endian 模式 ......................................................................................................................... 9
2.2.3.8.2 16 位 local bus—big endian 模式 ....................................................................................................................... 10
2.2.3.8.3 8 位 local bus—big endian 模式 ......................................................................................................................... 10
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