MOTOROLA 30-W2960B01A模块卡件
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MOTOROLA 30-W2960B01A是一种控制器卡件模块
MOTOROLA 30-W2960B01A增加了对消息信号中断CI中断线路的电平触发。这是通过选择边缘触发来获得优势的，以在服务共享中断线时获得健壮性。PCI规范的后续版本增加了对消息信号中断的支持
MOTOROLA MVME712A/AM指定了它所实现的功能和寄存器。这类似于I/O读取，但是从PCI配置空间读取。只有当地址的低11位指定了它所实现的功能和寄存器，并且特殊的IDSEL信号被置位时，MOTOROLA 30-W2960B01A器件才必须做出响应。它必须忽略高21位。PCI配置空间允许突发读取（使用线性递增）。
MOTOROLA 30-W2960B01A与I/O空间不同，标准PCI配置寄存器的定义使得读操作永远不会干扰设备的状态。设备的配置空间寄存器可能会超过标准的64字节，这会产生读取副作用，但这种情况很少见。MOTOROLA 30-W2960B01A配置空间访问通常有几个周期的延迟，以允许IDSEL线路稳定，这使得它们比其他形式的访问慢
MOTOROLA 30-W2960B01A is a controller card module
MOTOROLA 30-W2960B01A adds a level trigger for message signal interrupt CI interrupt lines. This is achieved by selecting edge triggers to gain advantage in order to achieve robustness when services share interruption lines. Subsequent versions of the PCI specification have added support for message signal interrupts
MOTOROLA MVME712A/AM specifies the functions and registers it implements. This is similar to an I/O read, but read from the PCI configuration space. The MOTOROLA 30-W2960B01A device must respond only when the lower 11 bits of the address specify the function and register it implements, and the special IDSEL signal is set. It must ignore the high 21 bits. PCI configuration space allows for burst reads (using linear increments).
MOTOROLA 30-W2960B01A differs from I/O space in that the definition of a standard PCI configuration register ensures that read operations never interfere with the state of the device. The device's configuration space register may exceed the standard 64 bytes, which can have a read side effect, but this is rare. MOTOROLA 30-W2960B01A configuration space access typically has several cycles of delay to allow IDSEL lines to stabilize, which makes them slower than other forms of access
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