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参数资料
| 型号： | SYM53C180I2 |
| 厂商： | LSI CORP |
| 元件分类： | 总线控制器 |
| 英文描述： | SCSI BUS CONTROLLER, PBGA192 |
| 封装： | 23 X 23 MM, 1.27 MM PITCH, PLASTIC, BGA-192 |
| 文件页数： | 62/78页 |
| 文件大小： | 1073K |
| 代理商： | SYM53C180I2 |
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B-5
Phase
One of the eight states to which the SCSI bus can be set. During each
phase, different communication tasks can be performed.
Port
A connection into a bus.
Priority
The ranking of the devices on the bus during arbitration.
Protocol
A convention for data transmission that encompasses timing control,
formatting, and data representation.
Receiver
The circuitry that receives electrical signals on a line.
Reconnect
The function that occurs when a target reselects an initiator to continue an
operation after a disconnect.
Release
The act of allowing the cable terminators to bias the signal to the false
state (by placing the driver in the high impedance condition).
REQ/
Request – Driven by a target, indicates a request for a SCSI data-transfer
handshake. This signal is received by the initiator.
Reselect
A target can disconnect from an initiator in order to perform a time-
consuming function, such as a disk seek. After performing the operation,
the target can “reselect” the initiator.
RESET
Reset – Clears all internal registers when active. It does not assert the
SCSI RST/ signal and therefore does not reset the SCSI bus.
RST
Reset – Indicates a SCSI Bus reset condition.
SCSI Address
The octal representation of the unique address ([7:0]) assigned to an
SCSI device. This address is normally assigned and set in the SCSI
device during system installation.
SCSI ID
(Identication)
or SCSI Device
ID
The bit-signicant representation of the SCSI address referring to one of
the signal lines DB7/ through DB0/.
SCSI
Small Computer System Interface.
SCAM
An acronym for SCSI Congured AutoMatically. SCAM is the new SCSI
automatic ID assignment protocol. SCAM frees SCSI users from locating
and setting SCSI ID switches and jumpers. SCAM is the key part of Plug
and Play SCSI.
SEL/
Select – Used by an initiator to select a target, or by a target to reselect an
initiator.
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