| 摘要 |
For safe transmission of signals between a control unit (10) and single card or shared field-replaceable-unit adaptors (18), the link includes one dedicated request line (30) per device, an outgoing Device Control Adaptor Data line (34), an outgoing clock line (38) and two incoming lines (32,36) for request acknowledgements ano Device Data signals. The data lines (34,36) connect the shift register (42) of the control unit (10) to that (44) of the selected device (18), forming a loop (74). The second phase of the protocol is started only after error-free completion of the first.
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