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28075 xBAR 的疑问



28075 有 8 个 Output X-BAR

每个 Output X-BAR 有 32路 x4  的输入信号, 理论总共 128 路输入信号.

请问 8个 Output X-BAR 的这 128 路输入信号都是完全相同的吗?

从手册看不到不同之处, 但既然相同了, 还搞出 8个 Output X-BAR, 又有啥意思呢?