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tci6638k2k datasheet PCIE boot 配置 8.1.2.3.1 PCIe Boot Device Configuration

TI工程师你们好:

         在使用tci6638k2k处理器时,使用PCIE  BOOT模式加载,在看数据手册时Table8-12 PCIe Boot Device Configuration Field Descriptions中:第15-12位表示如下Bar Config,解释为PCIe BAR registers configuration This value can range from 0 to 0xf. See Table8-13.在查看图Table8-13后给了0到F总共16种配置。

数据手册中查找如下标识:

Table8-13 BAR Config / PCIe Window Sizes 

我不明白  比如BAR cfg设置为0b0000这中状态,bar1 为32  bar2为32  bar3 为32 此处的32表示什么意思