參數(shù)資料
型號: SYM53C180
廠商: LSI Corporation
英文描述: Ultra3 SCSI Bus Expander(Ultra2 SCSI總線擴展器)
中文描述: 個Ultra3 SCSI總線擴展(Ultra2的SCSI總線擴展器)
文件頁數(shù): 33/78頁
文件大?。?/td> 1073K
代理商: SYM53C180
Internal Control Descriptions
2-15
2.2.2.2 REQ/ACK
These input clock signals get edge filtered and stretched to minimum
values to avoid glitches. In double transition clocking, both leading and
trailing edges are filtered, while only the leading edge is filtered in single
transition clocking. These filters provide edge filtering to remove noise
within the initial signal transition. The current transmission speed selects
the time values.
2.2.3 Busy Filters
The busy control signal passes from source to load bus with filtering
selected by the current state of the SCSI bus. This filter provides a
synchronized leading edge signal that is not true until the input signal
has been stable. The trailing edge occurs within several nanoseconds of
the input being deasserted. When the BSY signal is asserted before and
after the SEL signal, the filter is on.
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