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)： 26/78頁
文件大小： 1073K
代理商： SYM53C180
2-8
Functional Descriptions
2.1.7.3 Select Control (SSEL)
A_SSEL and B_SSEL are control signals used during bus arbitration and
selection. Whichever side asserts, SSEL propagates it to the other side.
If both signals are asserted at the same time, the A Side receives SSEL
and sends it to the B Side. This output has pull-down control for an open
collector driver. The processing steps for the signals are:
1.
The input signal is blocked if it is being driven by the SYM53C180.
2.
The next stage is a leading edge filter. This ensures that the output
does not switch for a specified time after the leading edge. The
duration of the input signal then determines the duration of the
output.
3.
A parallel function ensures that bus (transmission line) recovery
occurs for a specified time after the last signal deassertion on each
signal line.
2.1.7.4 Busy Control (SBSY)
A_SBSY and B_SBSY signals are propagated from the source bus to the
load bus. The busy control signals go through this process:
1.
The bus is tested to ensure the signal if being driven by the
SYM53C180 is not misinterpreted as an incoming signal.
2.
The data is then leading edge filtered. The assertion edge is held for
a specified time to prevent any signal bounce. The input signal
controls the duration.
3.
The signal path switches the long and short filters used in the circuit
depending upon the current state of the SYM53C180. The current
state of the SYM53C180 State Machine that tracks SCSI phases
selects the mode. The short filter mode passes data through, while
the long filter mode indicates the bus free state. When the Busy
(SBSY) and Select (SSEL) sources switch from side to side, the long
filter mode is used. This output is then fed to the output driver, which
is a pull-down open collector only.
4.
A parallel function ensures that bus (transmission line) recovery is
available for a specified time after the last signal deassertion on each
signal line.
相關(guān)PDF資料
PDF描述
SYM53C710 32-Bit SCSI I/O Processor(32位SCSI I/O處理器)
SYM53C770 SCSI I/O Processor With Ultra SCSI(帶超級SCSI的SCSI I/O處理器)
SYM53C810A PCI-SCSI I/O Processor(PCI-SCSI I/O接口處理器)
SYM53C825A PCI-SCSI I/O Processor(PCI-SCSI I/O接口處理器)
SYM53C825AE PCI-SCSI I/O Processor(PCI-SCSI I/O接口處理器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SYM53C400A 制造商:SYMBIOS 功能描述:
SYM53C770 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SCSI Bus Interface/Controller
SYM53C876E(PBGA) 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SCSI Bus Interface/Controller
SYM53C876E(PQFP) 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SCSI Bus Interface/Controller
SYM53C885 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*