參數(shù)資料
型號(hào)： MB86603
廠商： FUJITSU LTD
元件分類(lèi)： 總線控制器
英文描述： Communication Control SCSI-II Protocol Controller(通信控制SCSI-II協(xié)議控制器)
中文描述： SCSI BUS CONTROLLER, PQFP176
封裝： PLASTIC, SQFP-176
文件頁(yè)數(shù)： 7/58頁(yè)
文件大?。?/td> 401K
代理商： MB86603
7
MB86603
I
PIN DESCRIPTION
1. SCSI Interface
There are two types of SCSI interface corresponding to two types of transmission systems; each type operates
differently.
(Continued)
Pin No.
Pin Symbol
Pin Name
I/O
Function
109
REQ
Request
I/O
This is used for transfer request signals from the target to
the initiator in the information-transfer phase.
The input signal is used as a data transfer sequence timing
control signal.
The signal is Active Low.
123
ACK
Acknowledge
I/O
This is used for response signals from the initiator to the
target in response to the REQ signal in the information-
transfer phase.
The input signal is used as a data transfer sequence timing
control signal.
The signal is Active Low.
127
ATN
Attention
I/O
This is used for request signals for the message-transfer
phase from the initiator to the target.
The signal is Active Low.
117
MSG*
Message
I/O
This is used for signals specifying the type of information
transmitted on the data bus.
The signal is Active Low and goes Low when specifying the
message phase.
113
C/D*
Controll/Date
I/O
This is used for signals for specifying the type of
information transmitted on the data bus.
The signal is Active Low and goes Low when specifying the
command, status, and message phases.
107
I/O*
Input/Output
I/O
This is used for signals for specifying the transfer
direction of information transferred on the data bus.
The signal is Active Low. At Low, information is transferred
from the target to the initiator. At High, information is trans-
ferred from the initiator to the target.
124
BSY
Busy
I/O
This indicates that the SCSI bus is busy.
In the arbitration phase, this pin is used for signals requesting
bus acquisition.
The signal is Active Low.
115
SEL
Select
I/O
This is used for input of signals that are output and
detected by the initiator and target in the selection phase
(the initiator selects the target) and reselection phase (the
target reselects the initiator).
The signal is Active Low.
121
RST
Reset
I/O
This is used for output of reset signals to other SCSI
devices and for input of reset signals from other SCSI
devices.
The signal is Active Low.
131
BSYOE**
Busy Output
Enable
O
This is used for output control of BSY signals.
In the differential mode, this pin should be used for control sig-
nals for the external differential driver/receiver.
The signal is Active High.
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